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1da177e4 | 1 | /* |
1da177e4 LT |
2 | * Copyright (c) 2001 The Regents of the University of Michigan. |
3 | * All rights reserved. | |
4 | * | |
5 | * Kendrick Smith <kmsmith@umich.edu> | |
6 | * Andy Adamson <kandros@umich.edu> | |
7 | * | |
8 | * Redistribution and use in source and binary forms, with or without | |
9 | * modification, are permitted provided that the following conditions | |
10 | * are met: | |
11 | * | |
12 | * 1. Redistributions of source code must retain the above copyright | |
13 | * notice, this list of conditions and the following disclaimer. | |
14 | * 2. Redistributions in binary form must reproduce the above copyright | |
15 | * notice, this list of conditions and the following disclaimer in the | |
16 | * documentation and/or other materials provided with the distribution. | |
17 | * 3. Neither the name of the University nor the names of its | |
18 | * contributors may be used to endorse or promote products derived | |
19 | * from this software without specific prior written permission. | |
20 | * | |
21 | * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED | |
22 | * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF | |
23 | * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
24 | * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE | |
25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR | |
26 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF | |
27 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR | |
28 | * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | |
29 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | |
30 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
31 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
32 | * | |
33 | */ | |
34 | ||
aceaf78d | 35 | #include <linux/file.h> |
1da177e4 | 36 | #include <linux/smp_lock.h> |
0964a3d3 | 37 | #include <linux/namei.h> |
c2f1a551 | 38 | #include <linux/swap.h> |
68e76ad0 | 39 | #include <linux/sunrpc/svcauth_gss.h> |
363168b4 | 40 | #include <linux/sunrpc/clnt.h> |
9a74af21 | 41 | #include "xdr4.h" |
0a3adade | 42 | #include "vfs.h" |
1da177e4 LT |
43 | |
44 | #define NFSDDBG_FACILITY NFSDDBG_PROC | |
45 | ||
46 | /* Globals */ | |
cf07d2ea | 47 | time_t nfsd4_lease = 90; /* default lease time */ |
efc4bb4f | 48 | time_t nfsd4_grace = 90; |
fd39ca9a | 49 | static time_t boot_time; |
1da177e4 LT |
50 | static u32 current_ownerid = 1; |
51 | static u32 current_fileid = 1; | |
52 | static u32 current_delegid = 1; | |
53 | static u32 nfs4_init; | |
fd39ca9a N |
54 | static stateid_t zerostateid; /* bits all 0 */ |
55 | static stateid_t onestateid; /* bits all 1 */ | |
ec6b5d7b | 56 | static u64 current_sessionid = 1; |
fd39ca9a N |
57 | |
58 | #define ZERO_STATEID(stateid) (!memcmp((stateid), &zerostateid, sizeof(stateid_t))) | |
59 | #define ONE_STATEID(stateid) (!memcmp((stateid), &onestateid, sizeof(stateid_t))) | |
1da177e4 | 60 | |
1da177e4 | 61 | /* forward declarations */ |
fd39ca9a | 62 | static struct nfs4_stateid * find_stateid(stateid_t *stid, int flags); |
1da177e4 | 63 | static struct nfs4_delegation * find_delegation_stateid(struct inode *ino, stateid_t *stid); |
0964a3d3 N |
64 | static char user_recovery_dirname[PATH_MAX] = "/var/lib/nfs/v4recovery"; |
65 | static void nfs4_set_recdir(char *recdir); | |
1da177e4 | 66 | |
8b671b80 BF |
67 | /* Locking: */ |
68 | ||
69 | /* Currently used for almost all code touching nfsv4 state: */ | |
353ab6e9 | 70 | static DEFINE_MUTEX(client_mutex); |
1da177e4 | 71 | |
8b671b80 BF |
72 | /* |
73 | * Currently used for the del_recall_lru and file hash table. In an | |
74 | * effort to decrease the scope of the client_mutex, this spinlock may | |
75 | * eventually cover more: | |
76 | */ | |
77 | static DEFINE_SPINLOCK(recall_lock); | |
78 | ||
e18b890b CL |
79 | static struct kmem_cache *stateowner_slab = NULL; |
80 | static struct kmem_cache *file_slab = NULL; | |
81 | static struct kmem_cache *stateid_slab = NULL; | |
82 | static struct kmem_cache *deleg_slab = NULL; | |
e60d4398 | 83 | |
1da177e4 LT |
84 | void |
85 | nfs4_lock_state(void) | |
86 | { | |
353ab6e9 | 87 | mutex_lock(&client_mutex); |
1da177e4 LT |
88 | } |
89 | ||
90 | void | |
91 | nfs4_unlock_state(void) | |
92 | { | |
353ab6e9 | 93 | mutex_unlock(&client_mutex); |
1da177e4 LT |
94 | } |
95 | ||
96 | static inline u32 | |
97 | opaque_hashval(const void *ptr, int nbytes) | |
98 | { | |
99 | unsigned char *cptr = (unsigned char *) ptr; | |
100 | ||
101 | u32 x = 0; | |
102 | while (nbytes--) { | |
103 | x *= 37; | |
104 | x += *cptr++; | |
105 | } | |
106 | return x; | |
107 | } | |
108 | ||
1da177e4 LT |
109 | static struct list_head del_recall_lru; |
110 | ||
13cd2184 N |
111 | static inline void |
112 | put_nfs4_file(struct nfs4_file *fi) | |
113 | { | |
8b671b80 BF |
114 | if (atomic_dec_and_lock(&fi->fi_ref, &recall_lock)) { |
115 | list_del(&fi->fi_hash); | |
116 | spin_unlock(&recall_lock); | |
117 | iput(fi->fi_inode); | |
118 | kmem_cache_free(file_slab, fi); | |
119 | } | |
13cd2184 N |
120 | } |
121 | ||
122 | static inline void | |
123 | get_nfs4_file(struct nfs4_file *fi) | |
124 | { | |
8b671b80 | 125 | atomic_inc(&fi->fi_ref); |
13cd2184 N |
126 | } |
127 | ||
ef0f3390 | 128 | static int num_delegations; |
c2f1a551 | 129 | unsigned int max_delegations; |
ef0f3390 N |
130 | |
131 | /* | |
132 | * Open owner state (share locks) | |
133 | */ | |
134 | ||
135 | /* hash tables for nfs4_stateowner */ | |
136 | #define OWNER_HASH_BITS 8 | |
137 | #define OWNER_HASH_SIZE (1 << OWNER_HASH_BITS) | |
138 | #define OWNER_HASH_MASK (OWNER_HASH_SIZE - 1) | |
139 | ||
140 | #define ownerid_hashval(id) \ | |
141 | ((id) & OWNER_HASH_MASK) | |
142 | #define ownerstr_hashval(clientid, ownername) \ | |
143 | (((clientid) + opaque_hashval((ownername.data), (ownername.len))) & OWNER_HASH_MASK) | |
144 | ||
145 | static struct list_head ownerid_hashtbl[OWNER_HASH_SIZE]; | |
146 | static struct list_head ownerstr_hashtbl[OWNER_HASH_SIZE]; | |
147 | ||
148 | /* hash table for nfs4_file */ | |
149 | #define FILE_HASH_BITS 8 | |
150 | #define FILE_HASH_SIZE (1 << FILE_HASH_BITS) | |
151 | #define FILE_HASH_MASK (FILE_HASH_SIZE - 1) | |
152 | /* hash table for (open)nfs4_stateid */ | |
153 | #define STATEID_HASH_BITS 10 | |
154 | #define STATEID_HASH_SIZE (1 << STATEID_HASH_BITS) | |
155 | #define STATEID_HASH_MASK (STATEID_HASH_SIZE - 1) | |
156 | ||
157 | #define file_hashval(x) \ | |
158 | hash_ptr(x, FILE_HASH_BITS) | |
159 | #define stateid_hashval(owner_id, file_id) \ | |
160 | (((owner_id) + (file_id)) & STATEID_HASH_MASK) | |
161 | ||
162 | static struct list_head file_hashtbl[FILE_HASH_SIZE]; | |
163 | static struct list_head stateid_hashtbl[STATEID_HASH_SIZE]; | |
164 | ||
1da177e4 LT |
165 | static struct nfs4_delegation * |
166 | alloc_init_deleg(struct nfs4_client *clp, struct nfs4_stateid *stp, struct svc_fh *current_fh, u32 type) | |
167 | { | |
168 | struct nfs4_delegation *dp; | |
169 | struct nfs4_file *fp = stp->st_file; | |
c237dc03 | 170 | struct nfs4_cb_conn *cb = &stp->st_stateowner->so_client->cl_cb_conn; |
1da177e4 LT |
171 | |
172 | dprintk("NFSD alloc_init_deleg\n"); | |
47f9940c MS |
173 | if (fp->fi_had_conflict) |
174 | return NULL; | |
c2f1a551 | 175 | if (num_delegations > max_delegations) |
ef0f3390 | 176 | return NULL; |
5b2d21c1 N |
177 | dp = kmem_cache_alloc(deleg_slab, GFP_KERNEL); |
178 | if (dp == NULL) | |
1da177e4 | 179 | return dp; |
ef0f3390 | 180 | num_delegations++; |
ea1da636 N |
181 | INIT_LIST_HEAD(&dp->dl_perfile); |
182 | INIT_LIST_HEAD(&dp->dl_perclnt); | |
1da177e4 LT |
183 | INIT_LIST_HEAD(&dp->dl_recall_lru); |
184 | dp->dl_client = clp; | |
13cd2184 | 185 | get_nfs4_file(fp); |
1da177e4 LT |
186 | dp->dl_file = fp; |
187 | dp->dl_flock = NULL; | |
188 | get_file(stp->st_vfs_file); | |
189 | dp->dl_vfs_file = stp->st_vfs_file; | |
190 | dp->dl_type = type; | |
b53d40c5 | 191 | dp->dl_ident = cb->cb_ident; |
78155ed7 | 192 | dp->dl_stateid.si_boot = get_seconds(); |
1da177e4 LT |
193 | dp->dl_stateid.si_stateownerid = current_delegid++; |
194 | dp->dl_stateid.si_fileid = 0; | |
195 | dp->dl_stateid.si_generation = 0; | |
6c02eaa1 | 196 | fh_copy_shallow(&dp->dl_fh, ¤t_fh->fh_handle); |
1da177e4 LT |
197 | dp->dl_time = 0; |
198 | atomic_set(&dp->dl_count, 1); | |
ea1da636 N |
199 | list_add(&dp->dl_perfile, &fp->fi_delegations); |
200 | list_add(&dp->dl_perclnt, &clp->cl_delegations); | |
b5a1a81e | 201 | INIT_WORK(&dp->dl_recall.cb_work, nfsd4_do_callback_rpc); |
1da177e4 LT |
202 | return dp; |
203 | } | |
204 | ||
205 | void | |
206 | nfs4_put_delegation(struct nfs4_delegation *dp) | |
207 | { | |
208 | if (atomic_dec_and_test(&dp->dl_count)) { | |
209 | dprintk("NFSD: freeing dp %p\n",dp); | |
13cd2184 | 210 | put_nfs4_file(dp->dl_file); |
5b2d21c1 | 211 | kmem_cache_free(deleg_slab, dp); |
ef0f3390 | 212 | num_delegations--; |
1da177e4 LT |
213 | } |
214 | } | |
215 | ||
216 | /* Remove the associated file_lock first, then remove the delegation. | |
217 | * lease_modify() is called to remove the FS_LEASE file_lock from | |
218 | * the i_flock list, eventually calling nfsd's lock_manager | |
219 | * fl_release_callback. | |
220 | */ | |
221 | static void | |
222 | nfs4_close_delegation(struct nfs4_delegation *dp) | |
223 | { | |
224 | struct file *filp = dp->dl_vfs_file; | |
225 | ||
226 | dprintk("NFSD: close_delegation dp %p\n",dp); | |
227 | dp->dl_vfs_file = NULL; | |
228 | /* The following nfsd_close may not actually close the file, | |
229 | * but we want to remove the lease in any case. */ | |
c907132d | 230 | if (dp->dl_flock) |
a9933cea | 231 | vfs_setlease(filp, F_UNLCK, &dp->dl_flock); |
1da177e4 | 232 | nfsd_close(filp); |
1da177e4 LT |
233 | } |
234 | ||
235 | /* Called under the state lock. */ | |
236 | static void | |
237 | unhash_delegation(struct nfs4_delegation *dp) | |
238 | { | |
ea1da636 N |
239 | list_del_init(&dp->dl_perfile); |
240 | list_del_init(&dp->dl_perclnt); | |
1da177e4 LT |
241 | spin_lock(&recall_lock); |
242 | list_del_init(&dp->dl_recall_lru); | |
243 | spin_unlock(&recall_lock); | |
244 | nfs4_close_delegation(dp); | |
245 | nfs4_put_delegation(dp); | |
246 | } | |
247 | ||
248 | /* | |
249 | * SETCLIENTID state | |
250 | */ | |
251 | ||
252 | /* Hash tables for nfs4_clientid state */ | |
253 | #define CLIENT_HASH_BITS 4 | |
254 | #define CLIENT_HASH_SIZE (1 << CLIENT_HASH_BITS) | |
255 | #define CLIENT_HASH_MASK (CLIENT_HASH_SIZE - 1) | |
256 | ||
257 | #define clientid_hashval(id) \ | |
258 | ((id) & CLIENT_HASH_MASK) | |
a55370a3 N |
259 | #define clientstr_hashval(name) \ |
260 | (opaque_hashval((name), 8) & CLIENT_HASH_MASK) | |
1da177e4 LT |
261 | /* |
262 | * reclaim_str_hashtbl[] holds known client info from previous reset/reboot | |
263 | * used in reboot/reset lease grace period processing | |
264 | * | |
265 | * conf_id_hashtbl[], and conf_str_hashtbl[] hold confirmed | |
266 | * setclientid_confirmed info. | |
267 | * | |
268 | * unconf_str_hastbl[] and unconf_id_hashtbl[] hold unconfirmed | |
269 | * setclientid info. | |
270 | * | |
271 | * client_lru holds client queue ordered by nfs4_client.cl_time | |
272 | * for lease renewal. | |
273 | * | |
274 | * close_lru holds (open) stateowner queue ordered by nfs4_stateowner.so_time | |
275 | * for last close replay. | |
276 | */ | |
277 | static struct list_head reclaim_str_hashtbl[CLIENT_HASH_SIZE]; | |
278 | static int reclaim_str_hashtbl_size = 0; | |
279 | static struct list_head conf_id_hashtbl[CLIENT_HASH_SIZE]; | |
280 | static struct list_head conf_str_hashtbl[CLIENT_HASH_SIZE]; | |
281 | static struct list_head unconf_str_hashtbl[CLIENT_HASH_SIZE]; | |
282 | static struct list_head unconf_id_hashtbl[CLIENT_HASH_SIZE]; | |
283 | static struct list_head client_lru; | |
284 | static struct list_head close_lru; | |
285 | ||
2283963f BF |
286 | static void unhash_generic_stateid(struct nfs4_stateid *stp) |
287 | { | |
288 | list_del(&stp->st_hash); | |
289 | list_del(&stp->st_perfile); | |
290 | list_del(&stp->st_perstateowner); | |
291 | } | |
292 | ||
293 | static void free_generic_stateid(struct nfs4_stateid *stp) | |
294 | { | |
295 | put_nfs4_file(stp->st_file); | |
296 | kmem_cache_free(stateid_slab, stp); | |
297 | } | |
298 | ||
299 | static void release_lock_stateid(struct nfs4_stateid *stp) | |
300 | { | |
301 | unhash_generic_stateid(stp); | |
302 | locks_remove_posix(stp->st_vfs_file, (fl_owner_t)stp->st_stateowner); | |
303 | free_generic_stateid(stp); | |
304 | } | |
305 | ||
f044ff83 BF |
306 | static void unhash_lockowner(struct nfs4_stateowner *sop) |
307 | { | |
308 | struct nfs4_stateid *stp; | |
309 | ||
310 | list_del(&sop->so_idhash); | |
311 | list_del(&sop->so_strhash); | |
312 | list_del(&sop->so_perstateid); | |
313 | while (!list_empty(&sop->so_stateids)) { | |
314 | stp = list_first_entry(&sop->so_stateids, | |
315 | struct nfs4_stateid, st_perstateowner); | |
316 | release_lock_stateid(stp); | |
317 | } | |
318 | } | |
319 | ||
320 | static void release_lockowner(struct nfs4_stateowner *sop) | |
321 | { | |
322 | unhash_lockowner(sop); | |
323 | nfs4_put_stateowner(sop); | |
324 | } | |
325 | ||
f1d110ca BF |
326 | static void |
327 | release_stateid_lockowners(struct nfs4_stateid *open_stp) | |
328 | { | |
329 | struct nfs4_stateowner *lock_sop; | |
330 | ||
331 | while (!list_empty(&open_stp->st_lockowners)) { | |
332 | lock_sop = list_entry(open_stp->st_lockowners.next, | |
333 | struct nfs4_stateowner, so_perstateid); | |
334 | /* list_del(&open_stp->st_lockowners); */ | |
335 | BUG_ON(lock_sop->so_is_open_owner); | |
f044ff83 | 336 | release_lockowner(lock_sop); |
f1d110ca BF |
337 | } |
338 | } | |
339 | ||
2283963f BF |
340 | static void release_open_stateid(struct nfs4_stateid *stp) |
341 | { | |
342 | unhash_generic_stateid(stp); | |
343 | release_stateid_lockowners(stp); | |
344 | nfsd_close(stp->st_vfs_file); | |
345 | free_generic_stateid(stp); | |
346 | } | |
347 | ||
f044ff83 | 348 | static void unhash_openowner(struct nfs4_stateowner *sop) |
f1d110ca BF |
349 | { |
350 | struct nfs4_stateid *stp; | |
351 | ||
352 | list_del(&sop->so_idhash); | |
353 | list_del(&sop->so_strhash); | |
f044ff83 BF |
354 | list_del(&sop->so_perclient); |
355 | list_del(&sop->so_perstateid); /* XXX: necessary? */ | |
f1d110ca | 356 | while (!list_empty(&sop->so_stateids)) { |
f044ff83 BF |
357 | stp = list_first_entry(&sop->so_stateids, |
358 | struct nfs4_stateid, st_perstateowner); | |
359 | release_open_stateid(stp); | |
f1d110ca BF |
360 | } |
361 | } | |
362 | ||
f044ff83 | 363 | static void release_openowner(struct nfs4_stateowner *sop) |
f1d110ca | 364 | { |
f044ff83 | 365 | unhash_openowner(sop); |
f1d110ca BF |
366 | list_del(&sop->so_close_lru); |
367 | nfs4_put_stateowner(sop); | |
368 | } | |
369 | ||
5282fd72 ME |
370 | static DEFINE_SPINLOCK(sessionid_lock); |
371 | #define SESSION_HASH_SIZE 512 | |
372 | static struct list_head sessionid_hashtbl[SESSION_HASH_SIZE]; | |
373 | ||
374 | static inline int | |
375 | hash_sessionid(struct nfs4_sessionid *sessionid) | |
376 | { | |
377 | struct nfsd4_sessionid *sid = (struct nfsd4_sessionid *)sessionid; | |
378 | ||
379 | return sid->sequence % SESSION_HASH_SIZE; | |
380 | } | |
381 | ||
382 | static inline void | |
383 | dump_sessionid(const char *fn, struct nfs4_sessionid *sessionid) | |
384 | { | |
385 | u32 *ptr = (u32 *)(&sessionid->data[0]); | |
386 | dprintk("%s: %u:%u:%u:%u\n", fn, ptr[0], ptr[1], ptr[2], ptr[3]); | |
387 | } | |
388 | ||
ec6b5d7b AA |
389 | static void |
390 | gen_sessionid(struct nfsd4_session *ses) | |
391 | { | |
392 | struct nfs4_client *clp = ses->se_client; | |
393 | struct nfsd4_sessionid *sid; | |
394 | ||
395 | sid = (struct nfsd4_sessionid *)ses->se_sessionid.data; | |
396 | sid->clientid = clp->cl_clientid; | |
397 | sid->sequence = current_sessionid++; | |
398 | sid->reserved = 0; | |
399 | } | |
400 | ||
401 | /* | |
a649637c AA |
402 | * The protocol defines ca_maxresponssize_cached to include the size of |
403 | * the rpc header, but all we need to cache is the data starting after | |
404 | * the end of the initial SEQUENCE operation--the rest we regenerate | |
405 | * each time. Therefore we can advertise a ca_maxresponssize_cached | |
406 | * value that is the number of bytes in our cache plus a few additional | |
407 | * bytes. In order to stay on the safe side, and not promise more than | |
408 | * we can cache, those additional bytes must be the minimum possible: 24 | |
409 | * bytes of rpc header (xid through accept state, with AUTH_NULL | |
410 | * verifier), 12 for the compound header (with zero-length tag), and 44 | |
411 | * for the SEQUENCE op response: | |
412 | */ | |
413 | #define NFSD_MIN_HDR_SEQ_SZ (24 + 12 + 44) | |
414 | ||
415 | /* | |
416 | * Give the client the number of ca_maxresponsesize_cached slots it | |
417 | * requests, of size bounded by NFSD_SLOT_CACHE_SIZE, | |
418 | * NFSD_MAX_MEM_PER_SESSION, and nfsd_drc_max_mem. Do not allow more | |
419 | * than NFSD_MAX_SLOTS_PER_SESSION. | |
ec6b5d7b | 420 | * |
a649637c AA |
421 | * If we run out of reserved DRC memory we should (up to a point) |
422 | * re-negotiate active sessions and reduce their slot usage to make | |
423 | * rooom for new connections. For now we just fail the create session. | |
ec6b5d7b | 424 | */ |
a649637c | 425 | static int set_forechannel_drc_size(struct nfsd4_channel_attrs *fchan) |
ec6b5d7b | 426 | { |
a649637c | 427 | int mem, size = fchan->maxresp_cached; |
ec6b5d7b | 428 | |
5d77ddfb AA |
429 | if (fchan->maxreqs < 1) |
430 | return nfserr_inval; | |
5d77ddfb | 431 | |
a649637c AA |
432 | if (size < NFSD_MIN_HDR_SEQ_SZ) |
433 | size = NFSD_MIN_HDR_SEQ_SZ; | |
434 | size -= NFSD_MIN_HDR_SEQ_SZ; | |
435 | if (size > NFSD_SLOT_CACHE_SIZE) | |
436 | size = NFSD_SLOT_CACHE_SIZE; | |
ec6b5d7b | 437 | |
a649637c AA |
438 | /* bound the maxreqs by NFSD_MAX_MEM_PER_SESSION */ |
439 | mem = fchan->maxreqs * size; | |
440 | if (mem > NFSD_MAX_MEM_PER_SESSION) { | |
441 | fchan->maxreqs = NFSD_MAX_MEM_PER_SESSION / size; | |
442 | if (fchan->maxreqs > NFSD_MAX_SLOTS_PER_SESSION) | |
443 | fchan->maxreqs = NFSD_MAX_SLOTS_PER_SESSION; | |
444 | mem = fchan->maxreqs * size; | |
445 | } | |
ec6b5d7b | 446 | |
4bd9b0f4 | 447 | spin_lock(&nfsd_drc_lock); |
a649637c AA |
448 | /* bound the total session drc memory ussage */ |
449 | if (mem + nfsd_drc_mem_used > nfsd_drc_max_mem) { | |
450 | fchan->maxreqs = (nfsd_drc_max_mem - nfsd_drc_mem_used) / size; | |
451 | mem = fchan->maxreqs * size; | |
452 | } | |
0c193054 | 453 | nfsd_drc_mem_used += mem; |
4bd9b0f4 | 454 | spin_unlock(&nfsd_drc_lock); |
ec6b5d7b | 455 | |
b101ebbc | 456 | if (fchan->maxreqs == 0) |
bdac86e2 | 457 | return nfserr_serverfault; |
a649637c AA |
458 | |
459 | fchan->maxresp_cached = size + NFSD_MIN_HDR_SEQ_SZ; | |
b101ebbc | 460 | return 0; |
ec6b5d7b AA |
461 | } |
462 | ||
463 | /* | |
464 | * fchan holds the client values on input, and the server values on output | |
ddc04fd4 | 465 | * sv_max_mesg is the maximum payload plus one page for overhead. |
ec6b5d7b AA |
466 | */ |
467 | static int init_forechannel_attrs(struct svc_rqst *rqstp, | |
6c18ba9f AB |
468 | struct nfsd4_channel_attrs *session_fchan, |
469 | struct nfsd4_channel_attrs *fchan) | |
ec6b5d7b AA |
470 | { |
471 | int status = 0; | |
ddc04fd4 | 472 | __u32 maxcount = nfsd_serv->sv_max_mesg; |
ec6b5d7b AA |
473 | |
474 | /* headerpadsz set to zero in encode routine */ | |
475 | ||
476 | /* Use the client's max request and max response size if possible */ | |
477 | if (fchan->maxreq_sz > maxcount) | |
478 | fchan->maxreq_sz = maxcount; | |
6c18ba9f | 479 | session_fchan->maxreq_sz = fchan->maxreq_sz; |
ec6b5d7b AA |
480 | |
481 | if (fchan->maxresp_sz > maxcount) | |
482 | fchan->maxresp_sz = maxcount; | |
6c18ba9f | 483 | session_fchan->maxresp_sz = fchan->maxresp_sz; |
ec6b5d7b | 484 | |
ec6b5d7b AA |
485 | /* Use the client's maxops if possible */ |
486 | if (fchan->maxops > NFSD_MAX_OPS_PER_COMPOUND) | |
487 | fchan->maxops = NFSD_MAX_OPS_PER_COMPOUND; | |
6c18ba9f | 488 | session_fchan->maxops = fchan->maxops; |
ec6b5d7b | 489 | |
ec6b5d7b AA |
490 | /* FIXME: Error means no more DRC pages so the server should |
491 | * recover pages from existing sessions. For now fail session | |
492 | * creation. | |
493 | */ | |
a649637c | 494 | status = set_forechannel_drc_size(fchan); |
ec6b5d7b | 495 | |
a649637c | 496 | session_fchan->maxresp_cached = fchan->maxresp_cached; |
6c18ba9f | 497 | session_fchan->maxreqs = fchan->maxreqs; |
a649637c AA |
498 | |
499 | dprintk("%s status %d\n", __func__, status); | |
ec6b5d7b AA |
500 | return status; |
501 | } | |
502 | ||
557ce264 AA |
503 | static void |
504 | free_session_slots(struct nfsd4_session *ses) | |
505 | { | |
506 | int i; | |
507 | ||
508 | for (i = 0; i < ses->se_fchannel.maxreqs; i++) | |
509 | kfree(ses->se_slots[i]); | |
510 | } | |
511 | ||
efe0cb6d BF |
512 | /* |
513 | * We don't actually need to cache the rpc and session headers, so we | |
514 | * can allocate a little less for each slot: | |
515 | */ | |
516 | static inline int slot_bytes(struct nfsd4_channel_attrs *ca) | |
517 | { | |
518 | return ca->maxresp_cached - NFSD_MIN_HDR_SEQ_SZ; | |
519 | } | |
520 | ||
ec6b5d7b AA |
521 | static int |
522 | alloc_init_session(struct svc_rqst *rqstp, struct nfs4_client *clp, | |
523 | struct nfsd4_create_session *cses) | |
524 | { | |
525 | struct nfsd4_session *new, tmp; | |
557ce264 AA |
526 | struct nfsd4_slot *sp; |
527 | int idx, slotsize, cachesize, i; | |
528 | int status; | |
ec6b5d7b AA |
529 | |
530 | memset(&tmp, 0, sizeof(tmp)); | |
531 | ||
532 | /* FIXME: For now, we just accept the client back channel attributes. */ | |
6c18ba9f AB |
533 | tmp.se_bchannel = cses->back_channel; |
534 | status = init_forechannel_attrs(rqstp, &tmp.se_fchannel, | |
535 | &cses->fore_channel); | |
ec6b5d7b AA |
536 | if (status) |
537 | goto out; | |
538 | ||
557ce264 AA |
539 | BUILD_BUG_ON(NFSD_MAX_SLOTS_PER_SESSION * sizeof(struct nfsd4_slot) |
540 | + sizeof(struct nfsd4_session) > PAGE_SIZE); | |
541 | ||
542 | status = nfserr_serverfault; | |
543 | /* allocate struct nfsd4_session and slot table pointers in one piece */ | |
544 | slotsize = tmp.se_fchannel.maxreqs * sizeof(struct nfsd4_slot *); | |
ec6b5d7b AA |
545 | new = kzalloc(sizeof(*new) + slotsize, GFP_KERNEL); |
546 | if (!new) | |
547 | goto out; | |
548 | ||
549 | memcpy(new, &tmp, sizeof(*new)); | |
550 | ||
557ce264 | 551 | /* allocate each struct nfsd4_slot and data cache in one piece */ |
efe0cb6d | 552 | cachesize = slot_bytes(&new->se_fchannel); |
557ce264 AA |
553 | for (i = 0; i < new->se_fchannel.maxreqs; i++) { |
554 | sp = kzalloc(sizeof(*sp) + cachesize, GFP_KERNEL); | |
555 | if (!sp) | |
556 | goto out_free; | |
557 | new->se_slots[i] = sp; | |
558 | } | |
559 | ||
ec6b5d7b AA |
560 | new->se_client = clp; |
561 | gen_sessionid(new); | |
562 | idx = hash_sessionid(&new->se_sessionid); | |
563 | memcpy(clp->cl_sessionid.data, new->se_sessionid.data, | |
564 | NFS4_MAX_SESSIONID_LEN); | |
565 | ||
566 | new->se_flags = cses->flags; | |
567 | kref_init(&new->se_ref); | |
568 | spin_lock(&sessionid_lock); | |
569 | list_add(&new->se_hash, &sessionid_hashtbl[idx]); | |
570 | list_add(&new->se_perclnt, &clp->cl_sessions); | |
571 | spin_unlock(&sessionid_lock); | |
572 | ||
573 | status = nfs_ok; | |
574 | out: | |
575 | return status; | |
557ce264 AA |
576 | out_free: |
577 | free_session_slots(new); | |
578 | kfree(new); | |
579 | goto out; | |
ec6b5d7b AA |
580 | } |
581 | ||
5282fd72 ME |
582 | /* caller must hold sessionid_lock */ |
583 | static struct nfsd4_session * | |
584 | find_in_sessionid_hashtbl(struct nfs4_sessionid *sessionid) | |
585 | { | |
586 | struct nfsd4_session *elem; | |
587 | int idx; | |
588 | ||
589 | dump_sessionid(__func__, sessionid); | |
590 | idx = hash_sessionid(sessionid); | |
591 | dprintk("%s: idx is %d\n", __func__, idx); | |
592 | /* Search in the appropriate list */ | |
593 | list_for_each_entry(elem, &sessionid_hashtbl[idx], se_hash) { | |
594 | dump_sessionid("list traversal", &elem->se_sessionid); | |
595 | if (!memcmp(elem->se_sessionid.data, sessionid->data, | |
596 | NFS4_MAX_SESSIONID_LEN)) { | |
597 | return elem; | |
598 | } | |
599 | } | |
600 | ||
601 | dprintk("%s: session not found\n", __func__); | |
602 | return NULL; | |
603 | } | |
604 | ||
605 | /* caller must hold sessionid_lock */ | |
7116ed6b | 606 | static void |
5282fd72 | 607 | unhash_session(struct nfsd4_session *ses) |
7116ed6b AA |
608 | { |
609 | list_del(&ses->se_hash); | |
610 | list_del(&ses->se_perclnt); | |
5282fd72 ME |
611 | } |
612 | ||
613 | static void | |
614 | release_session(struct nfsd4_session *ses) | |
615 | { | |
616 | spin_lock(&sessionid_lock); | |
617 | unhash_session(ses); | |
618 | spin_unlock(&sessionid_lock); | |
7116ed6b AA |
619 | nfsd4_put_session(ses); |
620 | } | |
621 | ||
622 | void | |
623 | free_session(struct kref *kref) | |
624 | { | |
625 | struct nfsd4_session *ses; | |
dd829c45 | 626 | int mem; |
7116ed6b AA |
627 | |
628 | ses = container_of(kref, struct nfsd4_session, se_ref); | |
be98d1bb | 629 | spin_lock(&nfsd_drc_lock); |
efe0cb6d | 630 | mem = ses->se_fchannel.maxreqs * slot_bytes(&ses->se_fchannel); |
dd829c45 | 631 | nfsd_drc_mem_used -= mem; |
be98d1bb | 632 | spin_unlock(&nfsd_drc_lock); |
557ce264 | 633 | free_session_slots(ses); |
7116ed6b AA |
634 | kfree(ses); |
635 | } | |
636 | ||
1da177e4 LT |
637 | static inline void |
638 | renew_client(struct nfs4_client *clp) | |
639 | { | |
640 | /* | |
641 | * Move client to the end to the LRU list. | |
642 | */ | |
643 | dprintk("renewing client (clientid %08x/%08x)\n", | |
644 | clp->cl_clientid.cl_boot, | |
645 | clp->cl_clientid.cl_id); | |
646 | list_move_tail(&clp->cl_lru, &client_lru); | |
647 | clp->cl_time = get_seconds(); | |
648 | } | |
649 | ||
650 | /* SETCLIENTID and SETCLIENTID_CONFIRM Helper functions */ | |
651 | static int | |
652 | STALE_CLIENTID(clientid_t *clid) | |
653 | { | |
654 | if (clid->cl_boot == boot_time) | |
655 | return 0; | |
60adfc50 AA |
656 | dprintk("NFSD stale clientid (%08x/%08x) boot_time %08lx\n", |
657 | clid->cl_boot, clid->cl_id, boot_time); | |
1da177e4 LT |
658 | return 1; |
659 | } | |
660 | ||
661 | /* | |
662 | * XXX Should we use a slab cache ? | |
663 | * This type of memory management is somewhat inefficient, but we use it | |
664 | * anyway since SETCLIENTID is not a common operation. | |
665 | */ | |
35bba9a3 | 666 | static struct nfs4_client *alloc_client(struct xdr_netobj name) |
1da177e4 LT |
667 | { |
668 | struct nfs4_client *clp; | |
669 | ||
35bba9a3 BF |
670 | clp = kzalloc(sizeof(struct nfs4_client), GFP_KERNEL); |
671 | if (clp == NULL) | |
672 | return NULL; | |
673 | clp->cl_name.data = kmalloc(name.len, GFP_KERNEL); | |
674 | if (clp->cl_name.data == NULL) { | |
675 | kfree(clp); | |
676 | return NULL; | |
1da177e4 | 677 | } |
35bba9a3 BF |
678 | memcpy(clp->cl_name.data, name.data, name.len); |
679 | clp->cl_name.len = name.len; | |
1da177e4 LT |
680 | return clp; |
681 | } | |
682 | ||
683 | static inline void | |
684 | free_client(struct nfs4_client *clp) | |
685 | { | |
686 | if (clp->cl_cred.cr_group_info) | |
687 | put_group_info(clp->cl_cred.cr_group_info); | |
68e76ad0 | 688 | kfree(clp->cl_principal); |
1da177e4 LT |
689 | kfree(clp->cl_name.data); |
690 | kfree(clp); | |
691 | } | |
692 | ||
1da177e4 LT |
693 | static void |
694 | expire_client(struct nfs4_client *clp) | |
695 | { | |
696 | struct nfs4_stateowner *sop; | |
697 | struct nfs4_delegation *dp; | |
1da177e4 LT |
698 | struct list_head reaplist; |
699 | ||
1da177e4 LT |
700 | INIT_LIST_HEAD(&reaplist); |
701 | spin_lock(&recall_lock); | |
ea1da636 N |
702 | while (!list_empty(&clp->cl_delegations)) { |
703 | dp = list_entry(clp->cl_delegations.next, struct nfs4_delegation, dl_perclnt); | |
1da177e4 LT |
704 | dprintk("NFSD: expire client. dp %p, fp %p\n", dp, |
705 | dp->dl_flock); | |
ea1da636 | 706 | list_del_init(&dp->dl_perclnt); |
1da177e4 LT |
707 | list_move(&dp->dl_recall_lru, &reaplist); |
708 | } | |
709 | spin_unlock(&recall_lock); | |
710 | while (!list_empty(&reaplist)) { | |
711 | dp = list_entry(reaplist.next, struct nfs4_delegation, dl_recall_lru); | |
712 | list_del_init(&dp->dl_recall_lru); | |
713 | unhash_delegation(dp); | |
714 | } | |
715 | list_del(&clp->cl_idhash); | |
716 | list_del(&clp->cl_strhash); | |
717 | list_del(&clp->cl_lru); | |
ea1da636 N |
718 | while (!list_empty(&clp->cl_openowners)) { |
719 | sop = list_entry(clp->cl_openowners.next, struct nfs4_stateowner, so_perclient); | |
f044ff83 | 720 | release_openowner(sop); |
1da177e4 | 721 | } |
c4bf7868 ME |
722 | while (!list_empty(&clp->cl_sessions)) { |
723 | struct nfsd4_session *ses; | |
724 | ses = list_entry(clp->cl_sessions.next, struct nfsd4_session, | |
725 | se_perclnt); | |
726 | release_session(ses); | |
727 | } | |
b5a1a81e | 728 | nfsd4_set_callback_client(clp, NULL); |
2bf23875 BF |
729 | if (clp->cl_cb_conn.cb_xprt) |
730 | svc_xprt_put(clp->cl_cb_conn.cb_xprt); | |
b12a05cb | 731 | free_client(clp); |
1da177e4 LT |
732 | } |
733 | ||
35bba9a3 BF |
734 | static void copy_verf(struct nfs4_client *target, nfs4_verifier *source) |
735 | { | |
736 | memcpy(target->cl_verifier.data, source->data, | |
737 | sizeof(target->cl_verifier.data)); | |
1da177e4 LT |
738 | } |
739 | ||
35bba9a3 BF |
740 | static void copy_clid(struct nfs4_client *target, struct nfs4_client *source) |
741 | { | |
1da177e4 LT |
742 | target->cl_clientid.cl_boot = source->cl_clientid.cl_boot; |
743 | target->cl_clientid.cl_id = source->cl_clientid.cl_id; | |
744 | } | |
745 | ||
35bba9a3 BF |
746 | static void copy_cred(struct svc_cred *target, struct svc_cred *source) |
747 | { | |
1da177e4 LT |
748 | target->cr_uid = source->cr_uid; |
749 | target->cr_gid = source->cr_gid; | |
750 | target->cr_group_info = source->cr_group_info; | |
751 | get_group_info(target->cr_group_info); | |
752 | } | |
753 | ||
35bba9a3 | 754 | static int same_name(const char *n1, const char *n2) |
599e0a22 | 755 | { |
a55370a3 | 756 | return 0 == memcmp(n1, n2, HEXDIR_LEN); |
1da177e4 LT |
757 | } |
758 | ||
759 | static int | |
599e0a22 BF |
760 | same_verf(nfs4_verifier *v1, nfs4_verifier *v2) |
761 | { | |
762 | return 0 == memcmp(v1->data, v2->data, sizeof(v1->data)); | |
1da177e4 LT |
763 | } |
764 | ||
765 | static int | |
599e0a22 BF |
766 | same_clid(clientid_t *cl1, clientid_t *cl2) |
767 | { | |
768 | return (cl1->cl_boot == cl2->cl_boot) && (cl1->cl_id == cl2->cl_id); | |
1da177e4 LT |
769 | } |
770 | ||
771 | /* XXX what about NGROUP */ | |
772 | static int | |
599e0a22 BF |
773 | same_creds(struct svc_cred *cr1, struct svc_cred *cr2) |
774 | { | |
775 | return cr1->cr_uid == cr2->cr_uid; | |
1da177e4 LT |
776 | } |
777 | ||
5ec7b46c BF |
778 | static void gen_clid(struct nfs4_client *clp) |
779 | { | |
780 | static u32 current_clientid = 1; | |
781 | ||
1da177e4 LT |
782 | clp->cl_clientid.cl_boot = boot_time; |
783 | clp->cl_clientid.cl_id = current_clientid++; | |
784 | } | |
785 | ||
deda2faa BF |
786 | static void gen_confirm(struct nfs4_client *clp) |
787 | { | |
788 | static u32 i; | |
789 | u32 *p; | |
1da177e4 | 790 | |
1da177e4 | 791 | p = (u32 *)clp->cl_confirm.data; |
deda2faa BF |
792 | *p++ = get_seconds(); |
793 | *p++ = i++; | |
1da177e4 LT |
794 | } |
795 | ||
b09333c4 RL |
796 | static struct nfs4_client *create_client(struct xdr_netobj name, char *recdir, |
797 | struct svc_rqst *rqstp, nfs4_verifier *verf) | |
798 | { | |
799 | struct nfs4_client *clp; | |
800 | struct sockaddr *sa = svc_addr(rqstp); | |
801 | char *princ; | |
802 | ||
803 | clp = alloc_client(name); | |
804 | if (clp == NULL) | |
805 | return NULL; | |
806 | ||
807 | princ = svc_gss_principal(rqstp); | |
808 | if (princ) { | |
809 | clp->cl_principal = kstrdup(princ, GFP_KERNEL); | |
810 | if (clp->cl_principal == NULL) { | |
811 | free_client(clp); | |
812 | return NULL; | |
813 | } | |
814 | } | |
815 | ||
816 | memcpy(clp->cl_recdir, recdir, HEXDIR_LEN); | |
2bf23875 | 817 | atomic_set(&clp->cl_cb_set, 0); |
b09333c4 RL |
818 | INIT_LIST_HEAD(&clp->cl_idhash); |
819 | INIT_LIST_HEAD(&clp->cl_strhash); | |
820 | INIT_LIST_HEAD(&clp->cl_openowners); | |
821 | INIT_LIST_HEAD(&clp->cl_delegations); | |
822 | INIT_LIST_HEAD(&clp->cl_sessions); | |
823 | INIT_LIST_HEAD(&clp->cl_lru); | |
824 | clear_bit(0, &clp->cl_cb_slot_busy); | |
825 | rpc_init_wait_queue(&clp->cl_cb_waitq, "Backchannel slot table"); | |
826 | copy_verf(clp, verf); | |
827 | rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa); | |
828 | clp->cl_flavor = rqstp->rq_flavor; | |
829 | copy_cred(&clp->cl_cred, &rqstp->rq_cred); | |
830 | gen_confirm(clp); | |
831 | ||
832 | return clp; | |
833 | } | |
834 | ||
35bba9a3 BF |
835 | static int check_name(struct xdr_netobj name) |
836 | { | |
1da177e4 LT |
837 | if (name.len == 0) |
838 | return 0; | |
839 | if (name.len > NFS4_OPAQUE_LIMIT) { | |
2fdada03 | 840 | dprintk("NFSD: check_name: name too long(%d)!\n", name.len); |
1da177e4 LT |
841 | return 0; |
842 | } | |
843 | return 1; | |
844 | } | |
845 | ||
fd39ca9a | 846 | static void |
1da177e4 LT |
847 | add_to_unconfirmed(struct nfs4_client *clp, unsigned int strhashval) |
848 | { | |
849 | unsigned int idhashval; | |
850 | ||
851 | list_add(&clp->cl_strhash, &unconf_str_hashtbl[strhashval]); | |
852 | idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
853 | list_add(&clp->cl_idhash, &unconf_id_hashtbl[idhashval]); | |
854 | list_add_tail(&clp->cl_lru, &client_lru); | |
855 | clp->cl_time = get_seconds(); | |
856 | } | |
857 | ||
fd39ca9a | 858 | static void |
1da177e4 LT |
859 | move_to_confirmed(struct nfs4_client *clp) |
860 | { | |
861 | unsigned int idhashval = clientid_hashval(clp->cl_clientid.cl_id); | |
862 | unsigned int strhashval; | |
863 | ||
864 | dprintk("NFSD: move_to_confirm nfs4_client %p\n", clp); | |
865 | list_del_init(&clp->cl_strhash); | |
f116629d | 866 | list_move(&clp->cl_idhash, &conf_id_hashtbl[idhashval]); |
a55370a3 | 867 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 LT |
868 | list_add(&clp->cl_strhash, &conf_str_hashtbl[strhashval]); |
869 | renew_client(clp); | |
870 | } | |
871 | ||
872 | static struct nfs4_client * | |
873 | find_confirmed_client(clientid_t *clid) | |
874 | { | |
875 | struct nfs4_client *clp; | |
876 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
877 | ||
878 | list_for_each_entry(clp, &conf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 879 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
880 | return clp; |
881 | } | |
882 | return NULL; | |
883 | } | |
884 | ||
885 | static struct nfs4_client * | |
886 | find_unconfirmed_client(clientid_t *clid) | |
887 | { | |
888 | struct nfs4_client *clp; | |
889 | unsigned int idhashval = clientid_hashval(clid->cl_id); | |
890 | ||
891 | list_for_each_entry(clp, &unconf_id_hashtbl[idhashval], cl_idhash) { | |
599e0a22 | 892 | if (same_clid(&clp->cl_clientid, clid)) |
1da177e4 LT |
893 | return clp; |
894 | } | |
895 | return NULL; | |
896 | } | |
897 | ||
a1bcecd2 AA |
898 | /* |
899 | * Return 1 iff clp's clientid establishment method matches the use_exchange_id | |
900 | * parameter. Matching is based on the fact the at least one of the | |
901 | * EXCHGID4_FLAG_USE_{NON_PNFS,PNFS_MDS,PNFS_DS} flags must be set for v4.1 | |
902 | * | |
903 | * FIXME: we need to unify the clientid namespaces for nfsv4.x | |
904 | * and correctly deal with client upgrade/downgrade in EXCHANGE_ID | |
905 | * and SET_CLIENTID{,_CONFIRM} | |
906 | */ | |
907 | static inline int | |
908 | match_clientid_establishment(struct nfs4_client *clp, bool use_exchange_id) | |
909 | { | |
910 | bool has_exchange_flags = (clp->cl_exchange_flags != 0); | |
911 | return use_exchange_id == has_exchange_flags; | |
912 | } | |
913 | ||
28ce6054 | 914 | static struct nfs4_client * |
a1bcecd2 AA |
915 | find_confirmed_client_by_str(const char *dname, unsigned int hashval, |
916 | bool use_exchange_id) | |
28ce6054 N |
917 | { |
918 | struct nfs4_client *clp; | |
919 | ||
920 | list_for_each_entry(clp, &conf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
921 | if (same_name(clp->cl_recdir, dname) && |
922 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
923 | return clp; |
924 | } | |
925 | return NULL; | |
926 | } | |
927 | ||
928 | static struct nfs4_client * | |
a1bcecd2 AA |
929 | find_unconfirmed_client_by_str(const char *dname, unsigned int hashval, |
930 | bool use_exchange_id) | |
28ce6054 N |
931 | { |
932 | struct nfs4_client *clp; | |
933 | ||
934 | list_for_each_entry(clp, &unconf_str_hashtbl[hashval], cl_strhash) { | |
a1bcecd2 AA |
935 | if (same_name(clp->cl_recdir, dname) && |
936 | match_clientid_establishment(clp, use_exchange_id)) | |
28ce6054 N |
937 | return clp; |
938 | } | |
939 | return NULL; | |
940 | } | |
941 | ||
fd39ca9a | 942 | static void |
fbf4665f | 943 | gen_callback(struct nfs4_client *clp, struct nfsd4_setclientid *se, u32 scopeid) |
1da177e4 | 944 | { |
c237dc03 | 945 | struct nfs4_cb_conn *cb = &clp->cl_cb_conn; |
7077ecba JL |
946 | unsigned short expected_family; |
947 | ||
948 | /* Currently, we only support tcp and tcp6 for the callback channel */ | |
949 | if (se->se_callback_netid_len == 3 && | |
950 | !memcmp(se->se_callback_netid_val, "tcp", 3)) | |
951 | expected_family = AF_INET; | |
952 | else if (se->se_callback_netid_len == 4 && | |
953 | !memcmp(se->se_callback_netid_val, "tcp6", 4)) | |
954 | expected_family = AF_INET6; | |
955 | else | |
1da177e4 LT |
956 | goto out_err; |
957 | ||
aa9a4ec7 JL |
958 | cb->cb_addrlen = rpc_uaddr2sockaddr(se->se_callback_addr_val, |
959 | se->se_callback_addr_len, | |
960 | (struct sockaddr *) &cb->cb_addr, | |
961 | sizeof(cb->cb_addr)); | |
962 | ||
7077ecba | 963 | if (!cb->cb_addrlen || cb->cb_addr.ss_family != expected_family) |
1da177e4 | 964 | goto out_err; |
aa9a4ec7 | 965 | |
fbf4665f JL |
966 | if (cb->cb_addr.ss_family == AF_INET6) |
967 | ((struct sockaddr_in6 *) &cb->cb_addr)->sin6_scope_id = scopeid; | |
968 | ||
ab52ae6d | 969 | cb->cb_minorversion = 0; |
1da177e4 LT |
970 | cb->cb_prog = se->se_callback_prog; |
971 | cb->cb_ident = se->se_callback_ident; | |
1da177e4 LT |
972 | return; |
973 | out_err: | |
aa9a4ec7 JL |
974 | cb->cb_addr.ss_family = AF_UNSPEC; |
975 | cb->cb_addrlen = 0; | |
849823c5 | 976 | dprintk(KERN_INFO "NFSD: this client (clientid %08x/%08x) " |
1da177e4 LT |
977 | "will not receive delegations\n", |
978 | clp->cl_clientid.cl_boot, clp->cl_clientid.cl_id); | |
979 | ||
1da177e4 LT |
980 | return; |
981 | } | |
982 | ||
074fe897 | 983 | /* |
557ce264 | 984 | * Cache a reply. nfsd4_check_drc_limit() has bounded the cache size. |
074fe897 | 985 | */ |
074fe897 AA |
986 | void |
987 | nfsd4_store_cache_entry(struct nfsd4_compoundres *resp) | |
074fe897 | 988 | { |
557ce264 AA |
989 | struct nfsd4_slot *slot = resp->cstate.slot; |
990 | unsigned int base; | |
074fe897 | 991 | |
557ce264 | 992 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 993 | |
557ce264 AA |
994 | slot->sl_opcnt = resp->opcnt; |
995 | slot->sl_status = resp->cstate.status; | |
074fe897 | 996 | |
bf864a31 | 997 | if (nfsd4_not_cached(resp)) { |
557ce264 | 998 | slot->sl_datalen = 0; |
bf864a31 | 999 | return; |
074fe897 | 1000 | } |
557ce264 AA |
1001 | slot->sl_datalen = (char *)resp->p - (char *)resp->cstate.datap; |
1002 | base = (char *)resp->cstate.datap - | |
1003 | (char *)resp->xbuf->head[0].iov_base; | |
1004 | if (read_bytes_from_xdr_buf(resp->xbuf, base, slot->sl_data, | |
1005 | slot->sl_datalen)) | |
1006 | WARN("%s: sessions DRC could not cache compound\n", __func__); | |
1007 | return; | |
074fe897 AA |
1008 | } |
1009 | ||
1010 | /* | |
abfabf8c AA |
1011 | * Encode the replay sequence operation from the slot values. |
1012 | * If cachethis is FALSE encode the uncached rep error on the next | |
1013 | * operation which sets resp->p and increments resp->opcnt for | |
1014 | * nfs4svc_encode_compoundres. | |
074fe897 | 1015 | * |
074fe897 | 1016 | */ |
abfabf8c AA |
1017 | static __be32 |
1018 | nfsd4_enc_sequence_replay(struct nfsd4_compoundargs *args, | |
1019 | struct nfsd4_compoundres *resp) | |
074fe897 | 1020 | { |
abfabf8c AA |
1021 | struct nfsd4_op *op; |
1022 | struct nfsd4_slot *slot = resp->cstate.slot; | |
bf864a31 | 1023 | |
abfabf8c | 1024 | dprintk("--> %s resp->opcnt %d cachethis %u \n", __func__, |
557ce264 | 1025 | resp->opcnt, resp->cstate.slot->sl_cachethis); |
bf864a31 | 1026 | |
abfabf8c AA |
1027 | /* Encode the replayed sequence operation */ |
1028 | op = &args->ops[resp->opcnt - 1]; | |
1029 | nfsd4_encode_operation(resp, op); | |
bf864a31 | 1030 | |
abfabf8c | 1031 | /* Return nfserr_retry_uncached_rep in next operation. */ |
557ce264 | 1032 | if (args->opcnt > 1 && slot->sl_cachethis == 0) { |
abfabf8c AA |
1033 | op = &args->ops[resp->opcnt++]; |
1034 | op->status = nfserr_retry_uncached_rep; | |
1035 | nfsd4_encode_operation(resp, op); | |
074fe897 | 1036 | } |
abfabf8c | 1037 | return op->status; |
074fe897 AA |
1038 | } |
1039 | ||
1040 | /* | |
557ce264 AA |
1041 | * The sequence operation is not cached because we can use the slot and |
1042 | * session values. | |
074fe897 AA |
1043 | */ |
1044 | __be32 | |
bf864a31 AA |
1045 | nfsd4_replay_cache_entry(struct nfsd4_compoundres *resp, |
1046 | struct nfsd4_sequence *seq) | |
074fe897 | 1047 | { |
557ce264 | 1048 | struct nfsd4_slot *slot = resp->cstate.slot; |
074fe897 AA |
1049 | __be32 status; |
1050 | ||
557ce264 | 1051 | dprintk("--> %s slot %p\n", __func__, slot); |
074fe897 | 1052 | |
abfabf8c AA |
1053 | /* Either returns 0 or nfserr_retry_uncached */ |
1054 | status = nfsd4_enc_sequence_replay(resp->rqstp->rq_argp, resp); | |
1055 | if (status == nfserr_retry_uncached_rep) | |
1056 | return status; | |
074fe897 | 1057 | |
557ce264 AA |
1058 | /* The sequence operation has been encoded, cstate->datap set. */ |
1059 | memcpy(resp->cstate.datap, slot->sl_data, slot->sl_datalen); | |
074fe897 | 1060 | |
557ce264 AA |
1061 | resp->opcnt = slot->sl_opcnt; |
1062 | resp->p = resp->cstate.datap + XDR_QUADLEN(slot->sl_datalen); | |
1063 | status = slot->sl_status; | |
074fe897 AA |
1064 | |
1065 | return status; | |
1066 | } | |
1067 | ||
0733d213 AA |
1068 | /* |
1069 | * Set the exchange_id flags returned by the server. | |
1070 | */ | |
1071 | static void | |
1072 | nfsd4_set_ex_flags(struct nfs4_client *new, struct nfsd4_exchange_id *clid) | |
1073 | { | |
1074 | /* pNFS is not supported */ | |
1075 | new->cl_exchange_flags |= EXCHGID4_FLAG_USE_NON_PNFS; | |
1076 | ||
1077 | /* Referrals are supported, Migration is not. */ | |
1078 | new->cl_exchange_flags |= EXCHGID4_FLAG_SUPP_MOVED_REFER; | |
1079 | ||
1080 | /* set the wire flags to return to client. */ | |
1081 | clid->flags = new->cl_exchange_flags; | |
1082 | } | |
1083 | ||
069b6ad4 AA |
1084 | __be32 |
1085 | nfsd4_exchange_id(struct svc_rqst *rqstp, | |
1086 | struct nfsd4_compound_state *cstate, | |
1087 | struct nfsd4_exchange_id *exid) | |
1088 | { | |
0733d213 AA |
1089 | struct nfs4_client *unconf, *conf, *new; |
1090 | int status; | |
1091 | unsigned int strhashval; | |
1092 | char dname[HEXDIR_LEN]; | |
363168b4 | 1093 | char addr_str[INET6_ADDRSTRLEN]; |
0733d213 | 1094 | nfs4_verifier verf = exid->verifier; |
363168b4 | 1095 | struct sockaddr *sa = svc_addr(rqstp); |
0733d213 | 1096 | |
363168b4 | 1097 | rpc_ntop(sa, addr_str, sizeof(addr_str)); |
0733d213 | 1098 | dprintk("%s rqstp=%p exid=%p clname.len=%u clname.data=%p " |
363168b4 | 1099 | "ip_addr=%s flags %x, spa_how %d\n", |
0733d213 | 1100 | __func__, rqstp, exid, exid->clname.len, exid->clname.data, |
363168b4 | 1101 | addr_str, exid->flags, exid->spa_how); |
0733d213 AA |
1102 | |
1103 | if (!check_name(exid->clname) || (exid->flags & ~EXCHGID4_FLAG_MASK_A)) | |
1104 | return nfserr_inval; | |
1105 | ||
1106 | /* Currently only support SP4_NONE */ | |
1107 | switch (exid->spa_how) { | |
1108 | case SP4_NONE: | |
1109 | break; | |
1110 | case SP4_SSV: | |
1111 | return nfserr_encr_alg_unsupp; | |
1112 | default: | |
1113 | BUG(); /* checked by xdr code */ | |
1114 | case SP4_MACH_CRED: | |
1115 | return nfserr_serverfault; /* no excuse :-/ */ | |
1116 | } | |
1117 | ||
1118 | status = nfs4_make_rec_clidname(dname, &exid->clname); | |
1119 | ||
1120 | if (status) | |
1121 | goto error; | |
1122 | ||
1123 | strhashval = clientstr_hashval(dname); | |
1124 | ||
1125 | nfs4_lock_state(); | |
1126 | status = nfs_ok; | |
1127 | ||
a1bcecd2 | 1128 | conf = find_confirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1129 | if (conf) { |
1130 | if (!same_verf(&verf, &conf->cl_verifier)) { | |
1131 | /* 18.35.4 case 8 */ | |
1132 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1133 | status = nfserr_not_same; | |
1134 | goto out; | |
1135 | } | |
1136 | /* Client reboot: destroy old state */ | |
1137 | expire_client(conf); | |
1138 | goto out_new; | |
1139 | } | |
1140 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { | |
1141 | /* 18.35.4 case 9 */ | |
1142 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1143 | status = nfserr_perm; | |
1144 | goto out; | |
1145 | } | |
1146 | expire_client(conf); | |
1147 | goto out_new; | |
1148 | } | |
0733d213 AA |
1149 | /* |
1150 | * Set bit when the owner id and verifier map to an already | |
1151 | * confirmed client id (18.35.3). | |
1152 | */ | |
1153 | exid->flags |= EXCHGID4_FLAG_CONFIRMED_R; | |
1154 | ||
1155 | /* | |
1156 | * Falling into 18.35.4 case 2, possible router replay. | |
1157 | * Leave confirmed record intact and return same result. | |
1158 | */ | |
1159 | copy_verf(conf, &verf); | |
1160 | new = conf; | |
1161 | goto out_copy; | |
6ddbbbfe MS |
1162 | } |
1163 | ||
1164 | /* 18.35.4 case 7 */ | |
1165 | if (exid->flags & EXCHGID4_FLAG_UPD_CONFIRMED_REC_A) { | |
1166 | status = nfserr_noent; | |
1167 | goto out; | |
0733d213 AA |
1168 | } |
1169 | ||
a1bcecd2 | 1170 | unconf = find_unconfirmed_client_by_str(dname, strhashval, true); |
0733d213 AA |
1171 | if (unconf) { |
1172 | /* | |
1173 | * Possible retry or client restart. Per 18.35.4 case 4, | |
1174 | * a new unconfirmed record should be generated regardless | |
1175 | * of whether any properties have changed. | |
1176 | */ | |
1177 | expire_client(unconf); | |
1178 | } | |
1179 | ||
1180 | out_new: | |
1181 | /* Normal case */ | |
b09333c4 | 1182 | new = create_client(exid->clname, dname, rqstp, &verf); |
0733d213 | 1183 | if (new == NULL) { |
bdac86e2 | 1184 | status = nfserr_serverfault; |
0733d213 AA |
1185 | goto out; |
1186 | } | |
1187 | ||
0733d213 | 1188 | gen_clid(new); |
0733d213 AA |
1189 | add_to_unconfirmed(new, strhashval); |
1190 | out_copy: | |
1191 | exid->clientid.cl_boot = new->cl_clientid.cl_boot; | |
1192 | exid->clientid.cl_id = new->cl_clientid.cl_id; | |
1193 | ||
38eb76a5 | 1194 | exid->seqid = 1; |
0733d213 AA |
1195 | nfsd4_set_ex_flags(new, exid); |
1196 | ||
1197 | dprintk("nfsd4_exchange_id seqid %d flags %x\n", | |
49557cc7 | 1198 | new->cl_cs_slot.sl_seqid, new->cl_exchange_flags); |
0733d213 AA |
1199 | status = nfs_ok; |
1200 | ||
1201 | out: | |
1202 | nfs4_unlock_state(); | |
1203 | error: | |
1204 | dprintk("nfsd4_exchange_id returns %d\n", ntohl(status)); | |
1205 | return status; | |
069b6ad4 AA |
1206 | } |
1207 | ||
b85d4c01 | 1208 | static int |
88e588d5 | 1209 | check_slot_seqid(u32 seqid, u32 slot_seqid, int slot_inuse) |
b85d4c01 | 1210 | { |
88e588d5 AA |
1211 | dprintk("%s enter. seqid %d slot_seqid %d\n", __func__, seqid, |
1212 | slot_seqid); | |
b85d4c01 BH |
1213 | |
1214 | /* The slot is in use, and no response has been sent. */ | |
88e588d5 AA |
1215 | if (slot_inuse) { |
1216 | if (seqid == slot_seqid) | |
b85d4c01 BH |
1217 | return nfserr_jukebox; |
1218 | else | |
1219 | return nfserr_seq_misordered; | |
1220 | } | |
1221 | /* Normal */ | |
88e588d5 | 1222 | if (likely(seqid == slot_seqid + 1)) |
b85d4c01 BH |
1223 | return nfs_ok; |
1224 | /* Replay */ | |
88e588d5 | 1225 | if (seqid == slot_seqid) |
b85d4c01 BH |
1226 | return nfserr_replay_cache; |
1227 | /* Wraparound */ | |
88e588d5 | 1228 | if (seqid == 1 && (slot_seqid + 1) == 0) |
b85d4c01 BH |
1229 | return nfs_ok; |
1230 | /* Misordered replay or misordered new request */ | |
1231 | return nfserr_seq_misordered; | |
1232 | } | |
1233 | ||
49557cc7 AA |
1234 | /* |
1235 | * Cache the create session result into the create session single DRC | |
1236 | * slot cache by saving the xdr structure. sl_seqid has been set. | |
1237 | * Do this for solo or embedded create session operations. | |
1238 | */ | |
1239 | static void | |
1240 | nfsd4_cache_create_session(struct nfsd4_create_session *cr_ses, | |
1241 | struct nfsd4_clid_slot *slot, int nfserr) | |
1242 | { | |
1243 | slot->sl_status = nfserr; | |
1244 | memcpy(&slot->sl_cr_ses, cr_ses, sizeof(*cr_ses)); | |
1245 | } | |
1246 | ||
1247 | static __be32 | |
1248 | nfsd4_replay_create_session(struct nfsd4_create_session *cr_ses, | |
1249 | struct nfsd4_clid_slot *slot) | |
1250 | { | |
1251 | memcpy(cr_ses, &slot->sl_cr_ses, sizeof(*cr_ses)); | |
1252 | return slot->sl_status; | |
1253 | } | |
1254 | ||
069b6ad4 AA |
1255 | __be32 |
1256 | nfsd4_create_session(struct svc_rqst *rqstp, | |
1257 | struct nfsd4_compound_state *cstate, | |
1258 | struct nfsd4_create_session *cr_ses) | |
1259 | { | |
363168b4 | 1260 | struct sockaddr *sa = svc_addr(rqstp); |
ec6b5d7b | 1261 | struct nfs4_client *conf, *unconf; |
49557cc7 | 1262 | struct nfsd4_clid_slot *cs_slot = NULL; |
ec6b5d7b AA |
1263 | int status = 0; |
1264 | ||
1265 | nfs4_lock_state(); | |
1266 | unconf = find_unconfirmed_client(&cr_ses->clientid); | |
1267 | conf = find_confirmed_client(&cr_ses->clientid); | |
1268 | ||
1269 | if (conf) { | |
49557cc7 AA |
1270 | cs_slot = &conf->cl_cs_slot; |
1271 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 | 1272 | if (status == nfserr_replay_cache) { |
ec6b5d7b | 1273 | dprintk("Got a create_session replay! seqid= %d\n", |
49557cc7 | 1274 | cs_slot->sl_seqid); |
38eb76a5 | 1275 | /* Return the cached reply status */ |
49557cc7 | 1276 | status = nfsd4_replay_create_session(cr_ses, cs_slot); |
38eb76a5 | 1277 | goto out; |
49557cc7 | 1278 | } else if (cr_ses->seqid != cs_slot->sl_seqid + 1) { |
ec6b5d7b AA |
1279 | status = nfserr_seq_misordered; |
1280 | dprintk("Sequence misordered!\n"); | |
1281 | dprintk("Expected seqid= %d but got seqid= %d\n", | |
49557cc7 | 1282 | cs_slot->sl_seqid, cr_ses->seqid); |
ec6b5d7b AA |
1283 | goto out; |
1284 | } | |
49557cc7 | 1285 | cs_slot->sl_seqid++; |
ec6b5d7b AA |
1286 | } else if (unconf) { |
1287 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred) || | |
363168b4 | 1288 | !rpc_cmp_addr(sa, (struct sockaddr *) &unconf->cl_addr)) { |
ec6b5d7b AA |
1289 | status = nfserr_clid_inuse; |
1290 | goto out; | |
1291 | } | |
1292 | ||
49557cc7 AA |
1293 | cs_slot = &unconf->cl_cs_slot; |
1294 | status = check_slot_seqid(cr_ses->seqid, cs_slot->sl_seqid, 0); | |
38eb76a5 AA |
1295 | if (status) { |
1296 | /* an unconfirmed replay returns misordered */ | |
ec6b5d7b | 1297 | status = nfserr_seq_misordered; |
49557cc7 | 1298 | goto out_cache; |
ec6b5d7b AA |
1299 | } |
1300 | ||
49557cc7 | 1301 | cs_slot->sl_seqid++; /* from 0 to 1 */ |
ec6b5d7b AA |
1302 | move_to_confirmed(unconf); |
1303 | ||
38524ab3 | 1304 | if (cr_ses->flags & SESSION4_BACK_CHAN) { |
2bf23875 BF |
1305 | unconf->cl_cb_conn.cb_xprt = rqstp->rq_xprt; |
1306 | svc_xprt_get(rqstp->rq_xprt); | |
38524ab3 AA |
1307 | rpc_copy_addr( |
1308 | (struct sockaddr *)&unconf->cl_cb_conn.cb_addr, | |
1309 | sa); | |
1310 | unconf->cl_cb_conn.cb_addrlen = svc_addr_len(sa); | |
1311 | unconf->cl_cb_conn.cb_minorversion = | |
1312 | cstate->minorversion; | |
1313 | unconf->cl_cb_conn.cb_prog = cr_ses->callback_prog; | |
2a1d1b59 | 1314 | unconf->cl_cb_seq_nr = 1; |
38524ab3 AA |
1315 | nfsd4_probe_callback(unconf); |
1316 | } | |
ec6b5d7b AA |
1317 | conf = unconf; |
1318 | } else { | |
1319 | status = nfserr_stale_clientid; | |
1320 | goto out; | |
1321 | } | |
1322 | ||
408b79bc BF |
1323 | /* |
1324 | * We do not support RDMA or persistent sessions | |
1325 | */ | |
1326 | cr_ses->flags &= ~SESSION4_PERSIST; | |
1327 | cr_ses->flags &= ~SESSION4_RDMA; | |
1328 | ||
ec6b5d7b AA |
1329 | status = alloc_init_session(rqstp, conf, cr_ses); |
1330 | if (status) | |
1331 | goto out; | |
1332 | ||
ec6b5d7b AA |
1333 | memcpy(cr_ses->sessionid.data, conf->cl_sessionid.data, |
1334 | NFS4_MAX_SESSIONID_LEN); | |
49557cc7 | 1335 | cr_ses->seqid = cs_slot->sl_seqid; |
ec6b5d7b | 1336 | |
49557cc7 AA |
1337 | out_cache: |
1338 | /* cache solo and embedded create sessions under the state lock */ | |
1339 | nfsd4_cache_create_session(cr_ses, cs_slot, status); | |
ec6b5d7b AA |
1340 | out: |
1341 | nfs4_unlock_state(); | |
1342 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1343 | return status; | |
069b6ad4 AA |
1344 | } |
1345 | ||
1346 | __be32 | |
1347 | nfsd4_destroy_session(struct svc_rqst *r, | |
1348 | struct nfsd4_compound_state *cstate, | |
1349 | struct nfsd4_destroy_session *sessionid) | |
1350 | { | |
e10e0cfc BH |
1351 | struct nfsd4_session *ses; |
1352 | u32 status = nfserr_badsession; | |
1353 | ||
1354 | /* Notes: | |
1355 | * - The confirmed nfs4_client->cl_sessionid holds destroyed sessinid | |
1356 | * - Should we return nfserr_back_chan_busy if waiting for | |
1357 | * callbacks on to-be-destroyed session? | |
1358 | * - Do we need to clear any callback info from previous session? | |
1359 | */ | |
1360 | ||
1361 | dump_sessionid(__func__, &sessionid->sessionid); | |
1362 | spin_lock(&sessionid_lock); | |
1363 | ses = find_in_sessionid_hashtbl(&sessionid->sessionid); | |
1364 | if (!ses) { | |
1365 | spin_unlock(&sessionid_lock); | |
1366 | goto out; | |
1367 | } | |
1368 | ||
1369 | unhash_session(ses); | |
1370 | spin_unlock(&sessionid_lock); | |
1371 | ||
1372 | /* wait for callbacks */ | |
b5a1a81e | 1373 | nfsd4_set_callback_client(ses->se_client, NULL); |
e10e0cfc BH |
1374 | nfsd4_put_session(ses); |
1375 | status = nfs_ok; | |
1376 | out: | |
1377 | dprintk("%s returns %d\n", __func__, ntohl(status)); | |
1378 | return status; | |
069b6ad4 AA |
1379 | } |
1380 | ||
1381 | __be32 | |
b85d4c01 | 1382 | nfsd4_sequence(struct svc_rqst *rqstp, |
069b6ad4 AA |
1383 | struct nfsd4_compound_state *cstate, |
1384 | struct nfsd4_sequence *seq) | |
1385 | { | |
f9bb94c4 | 1386 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
b85d4c01 BH |
1387 | struct nfsd4_session *session; |
1388 | struct nfsd4_slot *slot; | |
1389 | int status; | |
1390 | ||
f9bb94c4 AA |
1391 | if (resp->opcnt != 1) |
1392 | return nfserr_sequence_pos; | |
1393 | ||
b85d4c01 BH |
1394 | spin_lock(&sessionid_lock); |
1395 | status = nfserr_badsession; | |
1396 | session = find_in_sessionid_hashtbl(&seq->sessionid); | |
1397 | if (!session) | |
1398 | goto out; | |
1399 | ||
1400 | status = nfserr_badslot; | |
6c18ba9f | 1401 | if (seq->slotid >= session->se_fchannel.maxreqs) |
b85d4c01 BH |
1402 | goto out; |
1403 | ||
557ce264 | 1404 | slot = session->se_slots[seq->slotid]; |
b85d4c01 BH |
1405 | dprintk("%s: slotid %d\n", __func__, seq->slotid); |
1406 | ||
a8dfdaeb AA |
1407 | /* We do not negotiate the number of slots yet, so set the |
1408 | * maxslots to the session maxreqs which is used to encode | |
1409 | * sr_highest_slotid and the sr_target_slot id to maxslots */ | |
1410 | seq->maxslots = session->se_fchannel.maxreqs; | |
1411 | ||
88e588d5 | 1412 | status = check_slot_seqid(seq->seqid, slot->sl_seqid, slot->sl_inuse); |
b85d4c01 BH |
1413 | if (status == nfserr_replay_cache) { |
1414 | cstate->slot = slot; | |
1415 | cstate->session = session; | |
da3846a2 | 1416 | /* Return the cached reply status and set cstate->status |
557ce264 | 1417 | * for nfsd4_proc_compound processing */ |
bf864a31 | 1418 | status = nfsd4_replay_cache_entry(resp, seq); |
da3846a2 | 1419 | cstate->status = nfserr_replay_cache; |
aaf84eb9 | 1420 | goto out; |
b85d4c01 BH |
1421 | } |
1422 | if (status) | |
1423 | goto out; | |
1424 | ||
1425 | /* Success! bump slot seqid */ | |
1426 | slot->sl_inuse = true; | |
1427 | slot->sl_seqid = seq->seqid; | |
557ce264 | 1428 | slot->sl_cachethis = seq->cachethis; |
b85d4c01 BH |
1429 | |
1430 | cstate->slot = slot; | |
1431 | cstate->session = session; | |
1432 | ||
aaf84eb9 | 1433 | /* Hold a session reference until done processing the compound: |
b85d4c01 BH |
1434 | * nfsd4_put_session called only if the cstate slot is set. |
1435 | */ | |
b85d4c01 BH |
1436 | nfsd4_get_session(session); |
1437 | out: | |
1438 | spin_unlock(&sessionid_lock); | |
aaf84eb9 BH |
1439 | /* Renew the clientid on success and on replay */ |
1440 | if (cstate->session) { | |
1441 | nfs4_lock_state(); | |
1442 | renew_client(session->se_client); | |
1443 | nfs4_unlock_state(); | |
1444 | } | |
b85d4c01 BH |
1445 | dprintk("%s: return %d\n", __func__, ntohl(status)); |
1446 | return status; | |
069b6ad4 AA |
1447 | } |
1448 | ||
b37ad28b | 1449 | __be32 |
b591480b BF |
1450 | nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
1451 | struct nfsd4_setclientid *setclid) | |
1da177e4 | 1452 | { |
363168b4 | 1453 | struct sockaddr *sa = svc_addr(rqstp); |
1da177e4 LT |
1454 | struct xdr_netobj clname = { |
1455 | .len = setclid->se_namelen, | |
1456 | .data = setclid->se_name, | |
1457 | }; | |
1458 | nfs4_verifier clverifier = setclid->se_verf; | |
1459 | unsigned int strhashval; | |
28ce6054 | 1460 | struct nfs4_client *conf, *unconf, *new; |
b37ad28b | 1461 | __be32 status; |
a55370a3 | 1462 | char dname[HEXDIR_LEN]; |
1da177e4 | 1463 | |
1da177e4 | 1464 | if (!check_name(clname)) |
73aea4ec | 1465 | return nfserr_inval; |
1da177e4 | 1466 | |
a55370a3 N |
1467 | status = nfs4_make_rec_clidname(dname, &clname); |
1468 | if (status) | |
73aea4ec | 1469 | return status; |
a55370a3 | 1470 | |
1da177e4 LT |
1471 | /* |
1472 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1473 | * We get here on a DRC miss. | |
1474 | */ | |
1475 | ||
a55370a3 | 1476 | strhashval = clientstr_hashval(dname); |
1da177e4 | 1477 | |
1da177e4 | 1478 | nfs4_lock_state(); |
a1bcecd2 | 1479 | conf = find_confirmed_client_by_str(dname, strhashval, false); |
28ce6054 | 1480 | if (conf) { |
a186e767 | 1481 | /* RFC 3530 14.2.33 CASE 0: */ |
1da177e4 | 1482 | status = nfserr_clid_inuse; |
026722c2 | 1483 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) { |
363168b4 JL |
1484 | char addr_str[INET6_ADDRSTRLEN]; |
1485 | rpc_ntop((struct sockaddr *) &conf->cl_addr, addr_str, | |
1486 | sizeof(addr_str)); | |
1487 | dprintk("NFSD: setclientid: string in use by client " | |
1488 | "at %s\n", addr_str); | |
1da177e4 LT |
1489 | goto out; |
1490 | } | |
1da177e4 | 1491 | } |
a186e767 BF |
1492 | /* |
1493 | * section 14.2.33 of RFC 3530 (under the heading "IMPLEMENTATION") | |
1494 | * has a description of SETCLIENTID request processing consisting | |
1495 | * of 5 bullet points, labeled as CASE0 - CASE4 below. | |
1496 | */ | |
a1bcecd2 | 1497 | unconf = find_unconfirmed_client_by_str(dname, strhashval, false); |
1da177e4 LT |
1498 | status = nfserr_resource; |
1499 | if (!conf) { | |
a186e767 BF |
1500 | /* |
1501 | * RFC 3530 14.2.33 CASE 4: | |
1502 | * placed first, because it is the normal case | |
1da177e4 LT |
1503 | */ |
1504 | if (unconf) | |
1505 | expire_client(unconf); | |
b09333c4 | 1506 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1507 | if (new == NULL) |
1da177e4 | 1508 | goto out; |
1da177e4 | 1509 | gen_clid(new); |
599e0a22 | 1510 | } else if (same_verf(&conf->cl_verifier, &clverifier)) { |
1da177e4 | 1511 | /* |
a186e767 BF |
1512 | * RFC 3530 14.2.33 CASE 1: |
1513 | * probable callback update | |
1da177e4 | 1514 | */ |
31f4a6c1 N |
1515 | if (unconf) { |
1516 | /* Note this is removing unconfirmed {*x***}, | |
1517 | * which is stronger than RFC recommended {vxc**}. | |
1518 | * This has the advantage that there is at most | |
1519 | * one {*x***} in either list at any time. | |
1520 | */ | |
1521 | expire_client(unconf); | |
1da177e4 | 1522 | } |
b09333c4 | 1523 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1524 | if (new == NULL) |
1da177e4 | 1525 | goto out; |
1da177e4 | 1526 | copy_clid(new, conf); |
1da177e4 LT |
1527 | } else if (!unconf) { |
1528 | /* | |
a186e767 BF |
1529 | * RFC 3530 14.2.33 CASE 2: |
1530 | * probable client reboot; state will be removed if | |
1531 | * confirmed. | |
1da177e4 | 1532 | */ |
b09333c4 | 1533 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1534 | if (new == NULL) |
1da177e4 | 1535 | goto out; |
1da177e4 | 1536 | gen_clid(new); |
49ba8781 | 1537 | } else { |
a186e767 BF |
1538 | /* |
1539 | * RFC 3530 14.2.33 CASE 3: | |
1540 | * probable client reboot; state will be removed if | |
1541 | * confirmed. | |
1da177e4 LT |
1542 | */ |
1543 | expire_client(unconf); | |
b09333c4 | 1544 | new = create_client(clname, dname, rqstp, &clverifier); |
a55370a3 | 1545 | if (new == NULL) |
1da177e4 | 1546 | goto out; |
1da177e4 | 1547 | gen_clid(new); |
1da177e4 | 1548 | } |
fbf4665f | 1549 | gen_callback(new, setclid, rpc_get_scope_id(sa)); |
c175b83c | 1550 | add_to_unconfirmed(new, strhashval); |
1da177e4 LT |
1551 | setclid->se_clientid.cl_boot = new->cl_clientid.cl_boot; |
1552 | setclid->se_clientid.cl_id = new->cl_clientid.cl_id; | |
1553 | memcpy(setclid->se_confirm.data, new->cl_confirm.data, sizeof(setclid->se_confirm.data)); | |
1554 | status = nfs_ok; | |
1555 | out: | |
1556 | nfs4_unlock_state(); | |
1557 | return status; | |
1558 | } | |
1559 | ||
1560 | ||
1561 | /* | |
a186e767 BF |
1562 | * Section 14.2.34 of RFC 3530 (under the heading "IMPLEMENTATION") has |
1563 | * a description of SETCLIENTID_CONFIRM request processing consisting of 4 | |
1564 | * bullets, labeled as CASE1 - CASE4 below. | |
1da177e4 | 1565 | */ |
b37ad28b | 1566 | __be32 |
b591480b BF |
1567 | nfsd4_setclientid_confirm(struct svc_rqst *rqstp, |
1568 | struct nfsd4_compound_state *cstate, | |
1569 | struct nfsd4_setclientid_confirm *setclientid_confirm) | |
1da177e4 | 1570 | { |
363168b4 | 1571 | struct sockaddr *sa = svc_addr(rqstp); |
21ab45a4 | 1572 | struct nfs4_client *conf, *unconf; |
1da177e4 LT |
1573 | nfs4_verifier confirm = setclientid_confirm->sc_confirm; |
1574 | clientid_t * clid = &setclientid_confirm->sc_clientid; | |
b37ad28b | 1575 | __be32 status; |
1da177e4 LT |
1576 | |
1577 | if (STALE_CLIENTID(clid)) | |
1578 | return nfserr_stale_clientid; | |
1579 | /* | |
1580 | * XXX The Duplicate Request Cache (DRC) has been checked (??) | |
1581 | * We get here on a DRC miss. | |
1582 | */ | |
1583 | ||
1584 | nfs4_lock_state(); | |
21ab45a4 N |
1585 | |
1586 | conf = find_confirmed_client(clid); | |
1587 | unconf = find_unconfirmed_client(clid); | |
1588 | ||
1589 | status = nfserr_clid_inuse; | |
363168b4 | 1590 | if (conf && !rpc_cmp_addr((struct sockaddr *) &conf->cl_addr, sa)) |
21ab45a4 | 1591 | goto out; |
363168b4 | 1592 | if (unconf && !rpc_cmp_addr((struct sockaddr *) &unconf->cl_addr, sa)) |
21ab45a4 N |
1593 | goto out; |
1594 | ||
a186e767 BF |
1595 | /* |
1596 | * section 14.2.34 of RFC 3530 has a description of | |
1597 | * SETCLIENTID_CONFIRM request processing consisting | |
1598 | * of 4 bullet points, labeled as CASE1 - CASE4 below. | |
1599 | */ | |
366e0c1d | 1600 | if (conf && unconf && same_verf(&confirm, &unconf->cl_confirm)) { |
a186e767 BF |
1601 | /* |
1602 | * RFC 3530 14.2.34 CASE 1: | |
1603 | * callback update | |
1604 | */ | |
599e0a22 | 1605 | if (!same_creds(&conf->cl_cred, &unconf->cl_cred)) |
1da177e4 LT |
1606 | status = nfserr_clid_inuse; |
1607 | else { | |
1a69c179 N |
1608 | /* XXX: We just turn off callbacks until we can handle |
1609 | * change request correctly. */ | |
2bf23875 | 1610 | atomic_set(&conf->cl_cb_set, 0); |
1a69c179 | 1611 | expire_client(unconf); |
1da177e4 | 1612 | status = nfs_ok; |
1a69c179 | 1613 | |
1da177e4 | 1614 | } |
f3aba4e5 | 1615 | } else if (conf && !unconf) { |
a186e767 BF |
1616 | /* |
1617 | * RFC 3530 14.2.34 CASE 2: | |
1618 | * probable retransmitted request; play it safe and | |
1619 | * do nothing. | |
7c79f737 | 1620 | */ |
599e0a22 | 1621 | if (!same_creds(&conf->cl_cred, &rqstp->rq_cred)) |
1da177e4 | 1622 | status = nfserr_clid_inuse; |
21ab45a4 | 1623 | else |
1da177e4 | 1624 | status = nfs_ok; |
7c79f737 | 1625 | } else if (!conf && unconf |
599e0a22 | 1626 | && same_verf(&unconf->cl_confirm, &confirm)) { |
a186e767 BF |
1627 | /* |
1628 | * RFC 3530 14.2.34 CASE 3: | |
1629 | * Normal case; new or rebooted client: | |
7c79f737 | 1630 | */ |
599e0a22 | 1631 | if (!same_creds(&unconf->cl_cred, &rqstp->rq_cred)) { |
1da177e4 LT |
1632 | status = nfserr_clid_inuse; |
1633 | } else { | |
1a69c179 N |
1634 | unsigned int hash = |
1635 | clientstr_hashval(unconf->cl_recdir); | |
1636 | conf = find_confirmed_client_by_str(unconf->cl_recdir, | |
a1bcecd2 | 1637 | hash, false); |
1a69c179 | 1638 | if (conf) { |
c7b9a459 | 1639 | nfsd4_remove_clid_dir(conf); |
1a69c179 N |
1640 | expire_client(conf); |
1641 | } | |
1da177e4 | 1642 | move_to_confirmed(unconf); |
21ab45a4 | 1643 | conf = unconf; |
46f8a64b | 1644 | nfsd4_probe_callback(conf); |
1a69c179 | 1645 | status = nfs_ok; |
1da177e4 | 1646 | } |
599e0a22 BF |
1647 | } else if ((!conf || (conf && !same_verf(&conf->cl_confirm, &confirm))) |
1648 | && (!unconf || (unconf && !same_verf(&unconf->cl_confirm, | |
7c79f737 | 1649 | &confirm)))) { |
a186e767 BF |
1650 | /* |
1651 | * RFC 3530 14.2.34 CASE 4: | |
1652 | * Client probably hasn't noticed that we rebooted yet. | |
7c79f737 | 1653 | */ |
1da177e4 | 1654 | status = nfserr_stale_clientid; |
7c79f737 | 1655 | } else { |
08e8987c N |
1656 | /* check that we have hit one of the cases...*/ |
1657 | status = nfserr_clid_inuse; | |
1658 | } | |
1da177e4 | 1659 | out: |
1da177e4 LT |
1660 | nfs4_unlock_state(); |
1661 | return status; | |
1662 | } | |
1663 | ||
1da177e4 LT |
1664 | /* OPEN Share state helper functions */ |
1665 | static inline struct nfs4_file * | |
1666 | alloc_init_file(struct inode *ino) | |
1667 | { | |
1668 | struct nfs4_file *fp; | |
1669 | unsigned int hashval = file_hashval(ino); | |
1670 | ||
e60d4398 N |
1671 | fp = kmem_cache_alloc(file_slab, GFP_KERNEL); |
1672 | if (fp) { | |
8b671b80 | 1673 | atomic_set(&fp->fi_ref, 1); |
1da177e4 | 1674 | INIT_LIST_HEAD(&fp->fi_hash); |
8beefa24 N |
1675 | INIT_LIST_HEAD(&fp->fi_stateids); |
1676 | INIT_LIST_HEAD(&fp->fi_delegations); | |
8b671b80 | 1677 | spin_lock(&recall_lock); |
1da177e4 | 1678 | list_add(&fp->fi_hash, &file_hashtbl[hashval]); |
8b671b80 | 1679 | spin_unlock(&recall_lock); |
1da177e4 LT |
1680 | fp->fi_inode = igrab(ino); |
1681 | fp->fi_id = current_fileid++; | |
47f9940c | 1682 | fp->fi_had_conflict = false; |
1da177e4 LT |
1683 | return fp; |
1684 | } | |
1685 | return NULL; | |
1686 | } | |
1687 | ||
e60d4398 | 1688 | static void |
e18b890b | 1689 | nfsd4_free_slab(struct kmem_cache **slab) |
1da177e4 | 1690 | { |
e60d4398 N |
1691 | if (*slab == NULL) |
1692 | return; | |
1a1d92c1 | 1693 | kmem_cache_destroy(*slab); |
e60d4398 | 1694 | *slab = NULL; |
1da177e4 LT |
1695 | } |
1696 | ||
e8ff2a84 | 1697 | void |
1da177e4 LT |
1698 | nfsd4_free_slabs(void) |
1699 | { | |
e60d4398 N |
1700 | nfsd4_free_slab(&stateowner_slab); |
1701 | nfsd4_free_slab(&file_slab); | |
5ac049ac | 1702 | nfsd4_free_slab(&stateid_slab); |
5b2d21c1 | 1703 | nfsd4_free_slab(&deleg_slab); |
e60d4398 | 1704 | } |
1da177e4 | 1705 | |
e60d4398 N |
1706 | static int |
1707 | nfsd4_init_slabs(void) | |
1708 | { | |
1709 | stateowner_slab = kmem_cache_create("nfsd4_stateowners", | |
20c2df83 | 1710 | sizeof(struct nfs4_stateowner), 0, 0, NULL); |
e60d4398 N |
1711 | if (stateowner_slab == NULL) |
1712 | goto out_nomem; | |
1713 | file_slab = kmem_cache_create("nfsd4_files", | |
20c2df83 | 1714 | sizeof(struct nfs4_file), 0, 0, NULL); |
e60d4398 N |
1715 | if (file_slab == NULL) |
1716 | goto out_nomem; | |
5ac049ac | 1717 | stateid_slab = kmem_cache_create("nfsd4_stateids", |
20c2df83 | 1718 | sizeof(struct nfs4_stateid), 0, 0, NULL); |
5ac049ac N |
1719 | if (stateid_slab == NULL) |
1720 | goto out_nomem; | |
5b2d21c1 | 1721 | deleg_slab = kmem_cache_create("nfsd4_delegations", |
20c2df83 | 1722 | sizeof(struct nfs4_delegation), 0, 0, NULL); |
5b2d21c1 N |
1723 | if (deleg_slab == NULL) |
1724 | goto out_nomem; | |
e60d4398 N |
1725 | return 0; |
1726 | out_nomem: | |
1727 | nfsd4_free_slabs(); | |
1728 | dprintk("nfsd4: out of memory while initializing nfsv4\n"); | |
1729 | return -ENOMEM; | |
1da177e4 LT |
1730 | } |
1731 | ||
1732 | void | |
1733 | nfs4_free_stateowner(struct kref *kref) | |
1734 | { | |
1735 | struct nfs4_stateowner *sop = | |
1736 | container_of(kref, struct nfs4_stateowner, so_ref); | |
1737 | kfree(sop->so_owner.data); | |
1738 | kmem_cache_free(stateowner_slab, sop); | |
1739 | } | |
1740 | ||
1741 | static inline struct nfs4_stateowner * | |
1742 | alloc_stateowner(struct xdr_netobj *owner) | |
1743 | { | |
1744 | struct nfs4_stateowner *sop; | |
1745 | ||
1746 | if ((sop = kmem_cache_alloc(stateowner_slab, GFP_KERNEL))) { | |
1747 | if ((sop->so_owner.data = kmalloc(owner->len, GFP_KERNEL))) { | |
1748 | memcpy(sop->so_owner.data, owner->data, owner->len); | |
1749 | sop->so_owner.len = owner->len; | |
1750 | kref_init(&sop->so_ref); | |
1751 | return sop; | |
1752 | } | |
1753 | kmem_cache_free(stateowner_slab, sop); | |
1754 | } | |
1755 | return NULL; | |
1756 | } | |
1757 | ||
1758 | static struct nfs4_stateowner * | |
1759 | alloc_init_open_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfsd4_open *open) { | |
1760 | struct nfs4_stateowner *sop; | |
1761 | struct nfs4_replay *rp; | |
1762 | unsigned int idhashval; | |
1763 | ||
1764 | if (!(sop = alloc_stateowner(&open->op_owner))) | |
1765 | return NULL; | |
1766 | idhashval = ownerid_hashval(current_ownerid); | |
1767 | INIT_LIST_HEAD(&sop->so_idhash); | |
1768 | INIT_LIST_HEAD(&sop->so_strhash); | |
1769 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
1770 | INIT_LIST_HEAD(&sop->so_stateids); |
1771 | INIT_LIST_HEAD(&sop->so_perstateid); /* not used */ | |
1da177e4 LT |
1772 | INIT_LIST_HEAD(&sop->so_close_lru); |
1773 | sop->so_time = 0; | |
1774 | list_add(&sop->so_idhash, &ownerid_hashtbl[idhashval]); | |
1775 | list_add(&sop->so_strhash, &ownerstr_hashtbl[strhashval]); | |
ea1da636 | 1776 | list_add(&sop->so_perclient, &clp->cl_openowners); |
1da177e4 LT |
1777 | sop->so_is_open_owner = 1; |
1778 | sop->so_id = current_ownerid++; | |
1779 | sop->so_client = clp; | |
1780 | sop->so_seqid = open->op_seqid; | |
1781 | sop->so_confirmed = 0; | |
1782 | rp = &sop->so_replay; | |
de1ae286 | 1783 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
1784 | rp->rp_buflen = 0; |
1785 | rp->rp_buf = rp->rp_ibuf; | |
1786 | return sop; | |
1787 | } | |
1788 | ||
1da177e4 LT |
1789 | static inline void |
1790 | init_stateid(struct nfs4_stateid *stp, struct nfs4_file *fp, struct nfsd4_open *open) { | |
1791 | struct nfs4_stateowner *sop = open->op_stateowner; | |
1792 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
1793 | ||
1794 | INIT_LIST_HEAD(&stp->st_hash); | |
ea1da636 N |
1795 | INIT_LIST_HEAD(&stp->st_perstateowner); |
1796 | INIT_LIST_HEAD(&stp->st_lockowners); | |
1da177e4 LT |
1797 | INIT_LIST_HEAD(&stp->st_perfile); |
1798 | list_add(&stp->st_hash, &stateid_hashtbl[hashval]); | |
ea1da636 | 1799 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
8beefa24 | 1800 | list_add(&stp->st_perfile, &fp->fi_stateids); |
1da177e4 | 1801 | stp->st_stateowner = sop; |
13cd2184 | 1802 | get_nfs4_file(fp); |
1da177e4 | 1803 | stp->st_file = fp; |
78155ed7 | 1804 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
1805 | stp->st_stateid.si_stateownerid = sop->so_id; |
1806 | stp->st_stateid.si_fileid = fp->fi_id; | |
1807 | stp->st_stateid.si_generation = 0; | |
1808 | stp->st_access_bmap = 0; | |
1809 | stp->st_deny_bmap = 0; | |
84459a11 AA |
1810 | __set_bit(open->op_share_access & ~NFS4_SHARE_WANT_MASK, |
1811 | &stp->st_access_bmap); | |
1da177e4 | 1812 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); |
4c4cd222 | 1813 | stp->st_openstp = NULL; |
1da177e4 LT |
1814 | } |
1815 | ||
fd39ca9a | 1816 | static void |
1da177e4 LT |
1817 | move_to_close_lru(struct nfs4_stateowner *sop) |
1818 | { | |
1819 | dprintk("NFSD: move_to_close_lru nfs4_stateowner %p\n", sop); | |
1820 | ||
358dd55a | 1821 | list_move_tail(&sop->so_close_lru, &close_lru); |
1da177e4 LT |
1822 | sop->so_time = get_seconds(); |
1823 | } | |
1824 | ||
1da177e4 | 1825 | static int |
599e0a22 BF |
1826 | same_owner_str(struct nfs4_stateowner *sop, struct xdr_netobj *owner, |
1827 | clientid_t *clid) | |
1828 | { | |
1829 | return (sop->so_owner.len == owner->len) && | |
1830 | 0 == memcmp(sop->so_owner.data, owner->data, owner->len) && | |
1831 | (sop->so_client->cl_clientid.cl_id == clid->cl_id); | |
1da177e4 LT |
1832 | } |
1833 | ||
1834 | static struct nfs4_stateowner * | |
1835 | find_openstateowner_str(unsigned int hashval, struct nfsd4_open *open) | |
1836 | { | |
1837 | struct nfs4_stateowner *so = NULL; | |
1838 | ||
1839 | list_for_each_entry(so, &ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 1840 | if (same_owner_str(so, &open->op_owner, &open->op_clientid)) |
1da177e4 LT |
1841 | return so; |
1842 | } | |
1843 | return NULL; | |
1844 | } | |
1845 | ||
1846 | /* search file_hashtbl[] for file */ | |
1847 | static struct nfs4_file * | |
1848 | find_file(struct inode *ino) | |
1849 | { | |
1850 | unsigned int hashval = file_hashval(ino); | |
1851 | struct nfs4_file *fp; | |
1852 | ||
8b671b80 | 1853 | spin_lock(&recall_lock); |
1da177e4 | 1854 | list_for_each_entry(fp, &file_hashtbl[hashval], fi_hash) { |
13cd2184 N |
1855 | if (fp->fi_inode == ino) { |
1856 | get_nfs4_file(fp); | |
8b671b80 | 1857 | spin_unlock(&recall_lock); |
1da177e4 | 1858 | return fp; |
13cd2184 | 1859 | } |
1da177e4 | 1860 | } |
8b671b80 | 1861 | spin_unlock(&recall_lock); |
1da177e4 LT |
1862 | return NULL; |
1863 | } | |
1864 | ||
d87a8ade | 1865 | static inline int access_valid(u32 x, u32 minorversion) |
ba5a6a19 | 1866 | { |
d87a8ade | 1867 | if ((x & NFS4_SHARE_ACCESS_MASK) < NFS4_SHARE_ACCESS_READ) |
8838dc43 | 1868 | return 0; |
d87a8ade AA |
1869 | if ((x & NFS4_SHARE_ACCESS_MASK) > NFS4_SHARE_ACCESS_BOTH) |
1870 | return 0; | |
1871 | x &= ~NFS4_SHARE_ACCESS_MASK; | |
1872 | if (minorversion && x) { | |
1873 | if ((x & NFS4_SHARE_WANT_MASK) > NFS4_SHARE_WANT_CANCEL) | |
1874 | return 0; | |
1875 | if ((x & NFS4_SHARE_WHEN_MASK) > NFS4_SHARE_PUSH_DELEG_WHEN_UNCONTENDED) | |
1876 | return 0; | |
1877 | x &= ~(NFS4_SHARE_WANT_MASK | NFS4_SHARE_WHEN_MASK); | |
1878 | } | |
1879 | if (x) | |
8838dc43 BF |
1880 | return 0; |
1881 | return 1; | |
ba5a6a19 BF |
1882 | } |
1883 | ||
8838dc43 | 1884 | static inline int deny_valid(u32 x) |
ba5a6a19 | 1885 | { |
8838dc43 BF |
1886 | /* Note: unlike access bits, deny bits may be zero. */ |
1887 | return x <= NFS4_SHARE_DENY_BOTH; | |
ba5a6a19 | 1888 | } |
1da177e4 | 1889 | |
4f83aa30 BF |
1890 | /* |
1891 | * We store the NONE, READ, WRITE, and BOTH bits separately in the | |
1892 | * st_{access,deny}_bmap field of the stateid, in order to track not | |
1893 | * only what share bits are currently in force, but also what | |
1894 | * combinations of share bits previous opens have used. This allows us | |
1895 | * to enforce the recommendation of rfc 3530 14.2.19 that the server | |
1896 | * return an error if the client attempt to downgrade to a combination | |
1897 | * of share bits not explicable by closing some of its previous opens. | |
1898 | * | |
1899 | * XXX: This enforcement is actually incomplete, since we don't keep | |
1900 | * track of access/deny bit combinations; so, e.g., we allow: | |
1901 | * | |
1902 | * OPEN allow read, deny write | |
1903 | * OPEN allow both, deny none | |
1904 | * DOWNGRADE allow read, deny none | |
1905 | * | |
1906 | * which we should reject. | |
1907 | */ | |
fd39ca9a | 1908 | static void |
1da177e4 LT |
1909 | set_access(unsigned int *access, unsigned long bmap) { |
1910 | int i; | |
1911 | ||
1912 | *access = 0; | |
1913 | for (i = 1; i < 4; i++) { | |
1914 | if (test_bit(i, &bmap)) | |
1915 | *access |= i; | |
1916 | } | |
1917 | } | |
1918 | ||
fd39ca9a | 1919 | static void |
1da177e4 LT |
1920 | set_deny(unsigned int *deny, unsigned long bmap) { |
1921 | int i; | |
1922 | ||
1923 | *deny = 0; | |
1924 | for (i = 0; i < 4; i++) { | |
1925 | if (test_bit(i, &bmap)) | |
1926 | *deny |= i ; | |
1927 | } | |
1928 | } | |
1929 | ||
1930 | static int | |
1931 | test_share(struct nfs4_stateid *stp, struct nfsd4_open *open) { | |
1932 | unsigned int access, deny; | |
1933 | ||
1934 | set_access(&access, stp->st_access_bmap); | |
1935 | set_deny(&deny, stp->st_deny_bmap); | |
1936 | if ((access & open->op_share_deny) || (deny & open->op_share_access)) | |
1937 | return 0; | |
1938 | return 1; | |
1939 | } | |
1940 | ||
1941 | /* | |
1942 | * Called to check deny when READ with all zero stateid or | |
1943 | * WRITE with all zero or all one stateid | |
1944 | */ | |
b37ad28b | 1945 | static __be32 |
1da177e4 LT |
1946 | nfs4_share_conflict(struct svc_fh *current_fh, unsigned int deny_type) |
1947 | { | |
1948 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
1949 | struct nfs4_file *fp; | |
1950 | struct nfs4_stateid *stp; | |
b37ad28b | 1951 | __be32 ret; |
1da177e4 LT |
1952 | |
1953 | dprintk("NFSD: nfs4_share_conflict\n"); | |
1954 | ||
1955 | fp = find_file(ino); | |
13cd2184 N |
1956 | if (!fp) |
1957 | return nfs_ok; | |
b700949b | 1958 | ret = nfserr_locked; |
1da177e4 | 1959 | /* Search for conflicting share reservations */ |
13cd2184 N |
1960 | list_for_each_entry(stp, &fp->fi_stateids, st_perfile) { |
1961 | if (test_bit(deny_type, &stp->st_deny_bmap) || | |
1962 | test_bit(NFS4_SHARE_DENY_BOTH, &stp->st_deny_bmap)) | |
1963 | goto out; | |
1da177e4 | 1964 | } |
13cd2184 N |
1965 | ret = nfs_ok; |
1966 | out: | |
1967 | put_nfs4_file(fp); | |
1968 | return ret; | |
1da177e4 LT |
1969 | } |
1970 | ||
1971 | static inline void | |
1972 | nfs4_file_downgrade(struct file *filp, unsigned int share_access) | |
1973 | { | |
1974 | if (share_access & NFS4_SHARE_ACCESS_WRITE) { | |
aceaf78d | 1975 | drop_file_write_access(filp); |
42e49608 | 1976 | spin_lock(&filp->f_lock); |
1da177e4 | 1977 | filp->f_mode = (filp->f_mode | FMODE_READ) & ~FMODE_WRITE; |
42e49608 | 1978 | spin_unlock(&filp->f_lock); |
1da177e4 LT |
1979 | } |
1980 | } | |
1981 | ||
1da177e4 LT |
1982 | /* |
1983 | * Spawn a thread to perform a recall on the delegation represented | |
1984 | * by the lease (file_lock) | |
1985 | * | |
1986 | * Called from break_lease() with lock_kernel() held. | |
1987 | * Note: we assume break_lease will only call this *once* for any given | |
1988 | * lease. | |
1989 | */ | |
1990 | static | |
1991 | void nfsd_break_deleg_cb(struct file_lock *fl) | |
1992 | { | |
63e4863f | 1993 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; |
1da177e4 LT |
1994 | |
1995 | dprintk("NFSD nfsd_break_deleg_cb: dp %p fl %p\n",dp,fl); | |
1996 | if (!dp) | |
1997 | return; | |
1998 | ||
1999 | /* We're assuming the state code never drops its reference | |
2000 | * without first removing the lease. Since we're in this lease | |
2001 | * callback (and since the lease code is serialized by the kernel | |
2002 | * lock) we know the server hasn't removed the lease yet, we know | |
2003 | * it's safe to take a reference: */ | |
2004 | atomic_inc(&dp->dl_count); | |
2005 | ||
2006 | spin_lock(&recall_lock); | |
2007 | list_add_tail(&dp->dl_recall_lru, &del_recall_lru); | |
2008 | spin_unlock(&recall_lock); | |
2009 | ||
2010 | /* only place dl_time is set. protected by lock_kernel*/ | |
2011 | dp->dl_time = get_seconds(); | |
2012 | ||
0272e1fd BF |
2013 | /* |
2014 | * We don't want the locks code to timeout the lease for us; | |
2015 | * we'll remove it ourself if the delegation isn't returned | |
2016 | * in time. | |
2017 | */ | |
2018 | fl->fl_break_time = 0; | |
1da177e4 | 2019 | |
63e4863f BF |
2020 | dp->dl_file->fi_had_conflict = true; |
2021 | nfsd4_cb_recall(dp); | |
1da177e4 LT |
2022 | } |
2023 | ||
2024 | /* | |
2025 | * The file_lock is being reapd. | |
2026 | * | |
2027 | * Called by locks_free_lock() with lock_kernel() held. | |
2028 | */ | |
2029 | static | |
2030 | void nfsd_release_deleg_cb(struct file_lock *fl) | |
2031 | { | |
2032 | struct nfs4_delegation *dp = (struct nfs4_delegation *)fl->fl_owner; | |
2033 | ||
2034 | dprintk("NFSD nfsd_release_deleg_cb: fl %p dp %p dl_count %d\n", fl,dp, atomic_read(&dp->dl_count)); | |
2035 | ||
2036 | if (!(fl->fl_flags & FL_LEASE) || !dp) | |
2037 | return; | |
2038 | dp->dl_flock = NULL; | |
2039 | } | |
2040 | ||
2041 | /* | |
2042 | * Set the delegation file_lock back pointer. | |
2043 | * | |
a9933cea | 2044 | * Called from setlease() with lock_kernel() held. |
1da177e4 LT |
2045 | */ |
2046 | static | |
2047 | void nfsd_copy_lock_deleg_cb(struct file_lock *new, struct file_lock *fl) | |
2048 | { | |
2049 | struct nfs4_delegation *dp = (struct nfs4_delegation *)new->fl_owner; | |
2050 | ||
2051 | dprintk("NFSD: nfsd_copy_lock_deleg_cb: new fl %p dp %p\n", new, dp); | |
2052 | if (!dp) | |
2053 | return; | |
2054 | dp->dl_flock = new; | |
2055 | } | |
2056 | ||
2057 | /* | |
a9933cea | 2058 | * Called from setlease() with lock_kernel() held |
1da177e4 LT |
2059 | */ |
2060 | static | |
2061 | int nfsd_same_client_deleg_cb(struct file_lock *onlist, struct file_lock *try) | |
2062 | { | |
2063 | struct nfs4_delegation *onlistd = | |
2064 | (struct nfs4_delegation *)onlist->fl_owner; | |
2065 | struct nfs4_delegation *tryd = | |
2066 | (struct nfs4_delegation *)try->fl_owner; | |
2067 | ||
2068 | if (onlist->fl_lmops != try->fl_lmops) | |
2069 | return 0; | |
2070 | ||
2071 | return onlistd->dl_client == tryd->dl_client; | |
2072 | } | |
2073 | ||
2074 | ||
2075 | static | |
2076 | int nfsd_change_deleg_cb(struct file_lock **onlist, int arg) | |
2077 | { | |
2078 | if (arg & F_UNLCK) | |
2079 | return lease_modify(onlist, arg); | |
2080 | else | |
2081 | return -EAGAIN; | |
2082 | } | |
2083 | ||
7b021967 | 2084 | static const struct lock_manager_operations nfsd_lease_mng_ops = { |
1da177e4 LT |
2085 | .fl_break = nfsd_break_deleg_cb, |
2086 | .fl_release_private = nfsd_release_deleg_cb, | |
2087 | .fl_copy_lock = nfsd_copy_lock_deleg_cb, | |
2088 | .fl_mylease = nfsd_same_client_deleg_cb, | |
2089 | .fl_change = nfsd_change_deleg_cb, | |
2090 | }; | |
2091 | ||
2092 | ||
b37ad28b | 2093 | __be32 |
6668958f AA |
2094 | nfsd4_process_open1(struct nfsd4_compound_state *cstate, |
2095 | struct nfsd4_open *open) | |
1da177e4 | 2096 | { |
1da177e4 LT |
2097 | clientid_t *clientid = &open->op_clientid; |
2098 | struct nfs4_client *clp = NULL; | |
2099 | unsigned int strhashval; | |
2100 | struct nfs4_stateowner *sop = NULL; | |
2101 | ||
1da177e4 | 2102 | if (!check_name(open->op_owner)) |
0f442aa2 | 2103 | return nfserr_inval; |
1da177e4 LT |
2104 | |
2105 | if (STALE_CLIENTID(&open->op_clientid)) | |
2106 | return nfserr_stale_clientid; | |
2107 | ||
2108 | strhashval = ownerstr_hashval(clientid->cl_id, open->op_owner); | |
2109 | sop = find_openstateowner_str(strhashval, open); | |
0f442aa2 BF |
2110 | open->op_stateowner = sop; |
2111 | if (!sop) { | |
2112 | /* Make sure the client's lease hasn't expired. */ | |
1da177e4 LT |
2113 | clp = find_confirmed_client(clientid); |
2114 | if (clp == NULL) | |
0f442aa2 BF |
2115 | return nfserr_expired; |
2116 | goto renew; | |
1da177e4 | 2117 | } |
6668958f AA |
2118 | /* When sessions are used, skip open sequenceid processing */ |
2119 | if (nfsd4_has_session(cstate)) | |
2120 | goto renew; | |
0f442aa2 BF |
2121 | if (!sop->so_confirmed) { |
2122 | /* Replace unconfirmed owners without checking for replay. */ | |
2123 | clp = sop->so_client; | |
f044ff83 | 2124 | release_openowner(sop); |
0f442aa2 BF |
2125 | open->op_stateowner = NULL; |
2126 | goto renew; | |
2127 | } | |
2128 | if (open->op_seqid == sop->so_seqid - 1) { | |
2129 | if (sop->so_replay.rp_buflen) | |
a90b061c | 2130 | return nfserr_replay_me; |
0f442aa2 BF |
2131 | /* The original OPEN failed so spectacularly |
2132 | * that we don't even have replay data saved! | |
2133 | * Therefore, we have no choice but to continue | |
2134 | * processing this OPEN; presumably, we'll | |
2135 | * fail again for the same reason. | |
2136 | */ | |
2137 | dprintk("nfsd4_process_open1: replay with no replay cache\n"); | |
2138 | goto renew; | |
2139 | } | |
2140 | if (open->op_seqid != sop->so_seqid) | |
2141 | return nfserr_bad_seqid; | |
1da177e4 | 2142 | renew: |
0f442aa2 BF |
2143 | if (open->op_stateowner == NULL) { |
2144 | sop = alloc_init_open_stateowner(strhashval, clp, open); | |
2145 | if (sop == NULL) | |
2146 | return nfserr_resource; | |
2147 | open->op_stateowner = sop; | |
2148 | } | |
2149 | list_del_init(&sop->so_close_lru); | |
1da177e4 | 2150 | renew_client(sop->so_client); |
0f442aa2 | 2151 | return nfs_ok; |
1da177e4 LT |
2152 | } |
2153 | ||
b37ad28b | 2154 | static inline __be32 |
4a6e43e6 N |
2155 | nfs4_check_delegmode(struct nfs4_delegation *dp, int flags) |
2156 | { | |
2157 | if ((flags & WR_STATE) && (dp->dl_type == NFS4_OPEN_DELEGATE_READ)) | |
2158 | return nfserr_openmode; | |
2159 | else | |
2160 | return nfs_ok; | |
2161 | } | |
2162 | ||
52f4fb43 N |
2163 | static struct nfs4_delegation * |
2164 | find_delegation_file(struct nfs4_file *fp, stateid_t *stid) | |
2165 | { | |
2166 | struct nfs4_delegation *dp; | |
2167 | ||
ea1da636 | 2168 | list_for_each_entry(dp, &fp->fi_delegations, dl_perfile) { |
52f4fb43 N |
2169 | if (dp->dl_stateid.si_stateownerid == stid->si_stateownerid) |
2170 | return dp; | |
2171 | } | |
2172 | return NULL; | |
2173 | } | |
2174 | ||
b37ad28b | 2175 | static __be32 |
567d9829 N |
2176 | nfs4_check_deleg(struct nfs4_file *fp, struct nfsd4_open *open, |
2177 | struct nfs4_delegation **dp) | |
2178 | { | |
2179 | int flags; | |
b37ad28b | 2180 | __be32 status = nfserr_bad_stateid; |
567d9829 N |
2181 | |
2182 | *dp = find_delegation_file(fp, &open->op_delegate_stateid); | |
2183 | if (*dp == NULL) | |
c44c5eeb | 2184 | goto out; |
567d9829 N |
2185 | flags = open->op_share_access == NFS4_SHARE_ACCESS_READ ? |
2186 | RD_STATE : WR_STATE; | |
2187 | status = nfs4_check_delegmode(*dp, flags); | |
2188 | if (status) | |
2189 | *dp = NULL; | |
c44c5eeb N |
2190 | out: |
2191 | if (open->op_claim_type != NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2192 | return nfs_ok; | |
2193 | if (status) | |
2194 | return status; | |
2195 | open->op_stateowner->so_confirmed = 1; | |
2196 | return nfs_ok; | |
567d9829 N |
2197 | } |
2198 | ||
b37ad28b | 2199 | static __be32 |
1da177e4 LT |
2200 | nfs4_check_open(struct nfs4_file *fp, struct nfsd4_open *open, struct nfs4_stateid **stpp) |
2201 | { | |
2202 | struct nfs4_stateid *local; | |
b37ad28b | 2203 | __be32 status = nfserr_share_denied; |
1da177e4 LT |
2204 | struct nfs4_stateowner *sop = open->op_stateowner; |
2205 | ||
8beefa24 | 2206 | list_for_each_entry(local, &fp->fi_stateids, st_perfile) { |
1da177e4 LT |
2207 | /* ignore lock owners */ |
2208 | if (local->st_stateowner->so_is_open_owner == 0) | |
2209 | continue; | |
2210 | /* remember if we have seen this open owner */ | |
2211 | if (local->st_stateowner == sop) | |
2212 | *stpp = local; | |
2213 | /* check for conflicting share reservations */ | |
2214 | if (!test_share(local, open)) | |
2215 | goto out; | |
2216 | } | |
2217 | status = 0; | |
2218 | out: | |
2219 | return status; | |
2220 | } | |
2221 | ||
5ac049ac N |
2222 | static inline struct nfs4_stateid * |
2223 | nfs4_alloc_stateid(void) | |
2224 | { | |
2225 | return kmem_cache_alloc(stateid_slab, GFP_KERNEL); | |
2226 | } | |
2227 | ||
b37ad28b | 2228 | static __be32 |
1da177e4 | 2229 | nfs4_new_open(struct svc_rqst *rqstp, struct nfs4_stateid **stpp, |
567d9829 | 2230 | struct nfs4_delegation *dp, |
1da177e4 LT |
2231 | struct svc_fh *cur_fh, int flags) |
2232 | { | |
2233 | struct nfs4_stateid *stp; | |
1da177e4 | 2234 | |
5ac049ac | 2235 | stp = nfs4_alloc_stateid(); |
1da177e4 LT |
2236 | if (stp == NULL) |
2237 | return nfserr_resource; | |
2238 | ||
567d9829 N |
2239 | if (dp) { |
2240 | get_file(dp->dl_vfs_file); | |
2241 | stp->st_vfs_file = dp->dl_vfs_file; | |
2242 | } else { | |
b37ad28b | 2243 | __be32 status; |
567d9829 N |
2244 | status = nfsd_open(rqstp, cur_fh, S_IFREG, flags, |
2245 | &stp->st_vfs_file); | |
2246 | if (status) { | |
2247 | if (status == nfserr_dropit) | |
2248 | status = nfserr_jukebox; | |
5ac049ac | 2249 | kmem_cache_free(stateid_slab, stp); |
567d9829 N |
2250 | return status; |
2251 | } | |
1da177e4 | 2252 | } |
1da177e4 LT |
2253 | *stpp = stp; |
2254 | return 0; | |
2255 | } | |
2256 | ||
b37ad28b | 2257 | static inline __be32 |
1da177e4 LT |
2258 | nfsd4_truncate(struct svc_rqst *rqstp, struct svc_fh *fh, |
2259 | struct nfsd4_open *open) | |
2260 | { | |
2261 | struct iattr iattr = { | |
2262 | .ia_valid = ATTR_SIZE, | |
2263 | .ia_size = 0, | |
2264 | }; | |
2265 | if (!open->op_truncate) | |
2266 | return 0; | |
2267 | if (!(open->op_share_access & NFS4_SHARE_ACCESS_WRITE)) | |
9246585a | 2268 | return nfserr_inval; |
1da177e4 LT |
2269 | return nfsd_setattr(rqstp, fh, &iattr, 0, (time_t)0); |
2270 | } | |
2271 | ||
b37ad28b | 2272 | static __be32 |
1da177e4 LT |
2273 | nfs4_upgrade_open(struct svc_rqst *rqstp, struct svc_fh *cur_fh, struct nfs4_stateid *stp, struct nfsd4_open *open) |
2274 | { | |
2275 | struct file *filp = stp->st_vfs_file; | |
7eaa36e2 | 2276 | struct inode *inode = filp->f_path.dentry->d_inode; |
6c26d08f | 2277 | unsigned int share_access, new_writer; |
b37ad28b | 2278 | __be32 status; |
1da177e4 LT |
2279 | |
2280 | set_access(&share_access, stp->st_access_bmap); | |
6c26d08f BF |
2281 | new_writer = (~share_access) & open->op_share_access |
2282 | & NFS4_SHARE_ACCESS_WRITE; | |
1da177e4 | 2283 | |
6c26d08f | 2284 | if (new_writer) { |
b37ad28b AV |
2285 | int err = get_write_access(inode); |
2286 | if (err) | |
2287 | return nfserrno(err); | |
e518f056 BH |
2288 | err = mnt_want_write(cur_fh->fh_export->ex_path.mnt); |
2289 | if (err) | |
2290 | return nfserrno(err); | |
2291 | file_take_write(filp); | |
6c26d08f | 2292 | } |
1da177e4 LT |
2293 | status = nfsd4_truncate(rqstp, cur_fh, open); |
2294 | if (status) { | |
6c26d08f BF |
2295 | if (new_writer) |
2296 | put_write_access(inode); | |
1da177e4 LT |
2297 | return status; |
2298 | } | |
2299 | /* remember the open */ | |
6c26d08f | 2300 | filp->f_mode |= open->op_share_access; |
b55e0ba1 BF |
2301 | __set_bit(open->op_share_access, &stp->st_access_bmap); |
2302 | __set_bit(open->op_share_deny, &stp->st_deny_bmap); | |
1da177e4 LT |
2303 | |
2304 | return nfs_ok; | |
2305 | } | |
2306 | ||
2307 | ||
1da177e4 | 2308 | static void |
37515177 | 2309 | nfs4_set_claim_prev(struct nfsd4_open *open) |
1da177e4 | 2310 | { |
37515177 N |
2311 | open->op_stateowner->so_confirmed = 1; |
2312 | open->op_stateowner->so_client->cl_firststate = 1; | |
1da177e4 LT |
2313 | } |
2314 | ||
2315 | /* | |
2316 | * Attempt to hand out a delegation. | |
2317 | */ | |
2318 | static void | |
2319 | nfs4_open_delegation(struct svc_fh *fh, struct nfsd4_open *open, struct nfs4_stateid *stp) | |
2320 | { | |
2321 | struct nfs4_delegation *dp; | |
2322 | struct nfs4_stateowner *sop = stp->st_stateowner; | |
2bf23875 | 2323 | int cb_up = atomic_read(&sop->so_client->cl_cb_set); |
1da177e4 LT |
2324 | struct file_lock fl, *flp = &fl; |
2325 | int status, flag = 0; | |
2326 | ||
2327 | flag = NFS4_OPEN_DELEGATE_NONE; | |
7b190fec N |
2328 | open->op_recall = 0; |
2329 | switch (open->op_claim_type) { | |
2330 | case NFS4_OPEN_CLAIM_PREVIOUS: | |
2bf23875 | 2331 | if (!cb_up) |
7b190fec N |
2332 | open->op_recall = 1; |
2333 | flag = open->op_delegate_type; | |
2334 | if (flag == NFS4_OPEN_DELEGATE_NONE) | |
2335 | goto out; | |
2336 | break; | |
2337 | case NFS4_OPEN_CLAIM_NULL: | |
2338 | /* Let's not give out any delegations till everyone's | |
2339 | * had the chance to reclaim theirs.... */ | |
af558e33 | 2340 | if (locks_in_grace()) |
7b190fec | 2341 | goto out; |
2bf23875 | 2342 | if (!cb_up || !sop->so_confirmed) |
7b190fec N |
2343 | goto out; |
2344 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) | |
2345 | flag = NFS4_OPEN_DELEGATE_WRITE; | |
2346 | else | |
2347 | flag = NFS4_OPEN_DELEGATE_READ; | |
2348 | break; | |
2349 | default: | |
2350 | goto out; | |
2351 | } | |
1da177e4 LT |
2352 | |
2353 | dp = alloc_init_deleg(sop->so_client, stp, fh, flag); | |
2354 | if (dp == NULL) { | |
2355 | flag = NFS4_OPEN_DELEGATE_NONE; | |
2356 | goto out; | |
2357 | } | |
2358 | locks_init_lock(&fl); | |
2359 | fl.fl_lmops = &nfsd_lease_mng_ops; | |
2360 | fl.fl_flags = FL_LEASE; | |
9167f501 | 2361 | fl.fl_type = flag == NFS4_OPEN_DELEGATE_READ? F_RDLCK: F_WRLCK; |
1da177e4 LT |
2362 | fl.fl_end = OFFSET_MAX; |
2363 | fl.fl_owner = (fl_owner_t)dp; | |
2364 | fl.fl_file = stp->st_vfs_file; | |
2365 | fl.fl_pid = current->tgid; | |
2366 | ||
a9933cea | 2367 | /* vfs_setlease checks to see if delegation should be handed out. |
1da177e4 LT |
2368 | * the lock_manager callbacks fl_mylease and fl_change are used |
2369 | */ | |
9167f501 | 2370 | if ((status = vfs_setlease(stp->st_vfs_file, fl.fl_type, &flp))) { |
1da177e4 | 2371 | dprintk("NFSD: setlease failed [%d], no delegation\n", status); |
c907132d | 2372 | unhash_delegation(dp); |
1da177e4 LT |
2373 | flag = NFS4_OPEN_DELEGATE_NONE; |
2374 | goto out; | |
2375 | } | |
2376 | ||
2377 | memcpy(&open->op_delegate_stateid, &dp->dl_stateid, sizeof(dp->dl_stateid)); | |
2378 | ||
8c10cbdb BH |
2379 | dprintk("NFSD: delegation stateid=" STATEID_FMT "\n", |
2380 | STATEID_VAL(&dp->dl_stateid)); | |
1da177e4 | 2381 | out: |
7b190fec N |
2382 | if (open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS |
2383 | && flag == NFS4_OPEN_DELEGATE_NONE | |
2384 | && open->op_delegate_type != NFS4_OPEN_DELEGATE_NONE) | |
2fdada03 | 2385 | dprintk("NFSD: WARNING: refusing delegation reclaim\n"); |
1da177e4 LT |
2386 | open->op_delegate_type = flag; |
2387 | } | |
2388 | ||
2389 | /* | |
2390 | * called with nfs4_lock_state() held. | |
2391 | */ | |
b37ad28b | 2392 | __be32 |
1da177e4 LT |
2393 | nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfsd4_open *open) |
2394 | { | |
6668958f | 2395 | struct nfsd4_compoundres *resp = rqstp->rq_resp; |
1da177e4 LT |
2396 | struct nfs4_file *fp = NULL; |
2397 | struct inode *ino = current_fh->fh_dentry->d_inode; | |
2398 | struct nfs4_stateid *stp = NULL; | |
567d9829 | 2399 | struct nfs4_delegation *dp = NULL; |
b37ad28b | 2400 | __be32 status; |
1da177e4 LT |
2401 | |
2402 | status = nfserr_inval; | |
d87a8ade | 2403 | if (!access_valid(open->op_share_access, resp->cstate.minorversion) |
ba5a6a19 | 2404 | || !deny_valid(open->op_share_deny)) |
1da177e4 LT |
2405 | goto out; |
2406 | /* | |
2407 | * Lookup file; if found, lookup stateid and check open request, | |
2408 | * and check for delegations in the process of being recalled. | |
2409 | * If not found, create the nfs4_file struct | |
2410 | */ | |
2411 | fp = find_file(ino); | |
2412 | if (fp) { | |
2413 | if ((status = nfs4_check_open(fp, open, &stp))) | |
2414 | goto out; | |
c44c5eeb N |
2415 | status = nfs4_check_deleg(fp, open, &dp); |
2416 | if (status) | |
2417 | goto out; | |
1da177e4 | 2418 | } else { |
c44c5eeb N |
2419 | status = nfserr_bad_stateid; |
2420 | if (open->op_claim_type == NFS4_OPEN_CLAIM_DELEGATE_CUR) | |
2421 | goto out; | |
1da177e4 LT |
2422 | status = nfserr_resource; |
2423 | fp = alloc_init_file(ino); | |
2424 | if (fp == NULL) | |
2425 | goto out; | |
2426 | } | |
2427 | ||
2428 | /* | |
2429 | * OPEN the file, or upgrade an existing OPEN. | |
2430 | * If truncate fails, the OPEN fails. | |
2431 | */ | |
2432 | if (stp) { | |
2433 | /* Stateid was found, this is an OPEN upgrade */ | |
2434 | status = nfs4_upgrade_open(rqstp, current_fh, stp, open); | |
2435 | if (status) | |
2436 | goto out; | |
444c2c07 | 2437 | update_stateid(&stp->st_stateid); |
1da177e4 LT |
2438 | } else { |
2439 | /* Stateid was not found, this is a new OPEN */ | |
2440 | int flags = 0; | |
9ecb6a08 | 2441 | if (open->op_share_access & NFS4_SHARE_ACCESS_READ) |
8837abca | 2442 | flags |= NFSD_MAY_READ; |
1da177e4 | 2443 | if (open->op_share_access & NFS4_SHARE_ACCESS_WRITE) |
8837abca | 2444 | flags |= NFSD_MAY_WRITE; |
567d9829 N |
2445 | status = nfs4_new_open(rqstp, &stp, dp, current_fh, flags); |
2446 | if (status) | |
1da177e4 LT |
2447 | goto out; |
2448 | init_stateid(stp, fp, open); | |
2449 | status = nfsd4_truncate(rqstp, current_fh, open); | |
2450 | if (status) { | |
2283963f | 2451 | release_open_stateid(stp); |
1da177e4 LT |
2452 | goto out; |
2453 | } | |
6668958f AA |
2454 | if (nfsd4_has_session(&resp->cstate)) |
2455 | update_stateid(&stp->st_stateid); | |
1da177e4 LT |
2456 | } |
2457 | memcpy(&open->op_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
2458 | ||
8b8aae40 | 2459 | if (nfsd4_has_session(&resp->cstate)) { |
6668958f | 2460 | open->op_stateowner->so_confirmed = 1; |
8b8aae40 RL |
2461 | nfsd4_create_clid_dir(open->op_stateowner->so_client); |
2462 | } | |
6668958f | 2463 | |
1da177e4 LT |
2464 | /* |
2465 | * Attempt to hand out a delegation. No error return, because the | |
2466 | * OPEN succeeds even if we fail. | |
2467 | */ | |
2468 | nfs4_open_delegation(current_fh, open, stp); | |
2469 | ||
2470 | status = nfs_ok; | |
2471 | ||
8c10cbdb BH |
2472 | dprintk("%s: stateid=" STATEID_FMT "\n", __func__, |
2473 | STATEID_VAL(&stp->st_stateid)); | |
1da177e4 | 2474 | out: |
13cd2184 N |
2475 | if (fp) |
2476 | put_nfs4_file(fp); | |
37515177 N |
2477 | if (status == 0 && open->op_claim_type == NFS4_OPEN_CLAIM_PREVIOUS) |
2478 | nfs4_set_claim_prev(open); | |
1da177e4 LT |
2479 | /* |
2480 | * To finish the open response, we just need to set the rflags. | |
2481 | */ | |
2482 | open->op_rflags = NFS4_OPEN_RESULT_LOCKTYPE_POSIX; | |
6668958f AA |
2483 | if (!open->op_stateowner->so_confirmed && |
2484 | !nfsd4_has_session(&resp->cstate)) | |
1da177e4 LT |
2485 | open->op_rflags |= NFS4_OPEN_RESULT_CONFIRM; |
2486 | ||
2487 | return status; | |
2488 | } | |
2489 | ||
b37ad28b | 2490 | __be32 |
b591480b BF |
2491 | nfsd4_renew(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
2492 | clientid_t *clid) | |
1da177e4 LT |
2493 | { |
2494 | struct nfs4_client *clp; | |
b37ad28b | 2495 | __be32 status; |
1da177e4 LT |
2496 | |
2497 | nfs4_lock_state(); | |
2498 | dprintk("process_renew(%08x/%08x): starting\n", | |
2499 | clid->cl_boot, clid->cl_id); | |
2500 | status = nfserr_stale_clientid; | |
2501 | if (STALE_CLIENTID(clid)) | |
2502 | goto out; | |
2503 | clp = find_confirmed_client(clid); | |
2504 | status = nfserr_expired; | |
2505 | if (clp == NULL) { | |
2506 | /* We assume the client took too long to RENEW. */ | |
2507 | dprintk("nfsd4_renew: clientid not found!\n"); | |
2508 | goto out; | |
2509 | } | |
2510 | renew_client(clp); | |
2511 | status = nfserr_cb_path_down; | |
ea1da636 | 2512 | if (!list_empty(&clp->cl_delegations) |
2bf23875 | 2513 | && !atomic_read(&clp->cl_cb_set)) |
1da177e4 LT |
2514 | goto out; |
2515 | status = nfs_ok; | |
2516 | out: | |
2517 | nfs4_unlock_state(); | |
2518 | return status; | |
2519 | } | |
2520 | ||
af558e33 BF |
2521 | struct lock_manager nfsd4_manager = { |
2522 | }; | |
2523 | ||
a76b4319 | 2524 | static void |
af558e33 | 2525 | nfsd4_end_grace(void) |
a76b4319 N |
2526 | { |
2527 | dprintk("NFSD: end of grace period\n"); | |
c7b9a459 | 2528 | nfsd4_recdir_purge_old(); |
af558e33 | 2529 | locks_end_grace(&nfsd4_manager); |
e46b498c BF |
2530 | /* |
2531 | * Now that every NFSv4 client has had the chance to recover and | |
2532 | * to see the (possibly new, possibly shorter) lease time, we | |
2533 | * can safely set the next grace time to the current lease time: | |
2534 | */ | |
2535 | nfsd4_grace = nfsd4_lease; | |
a76b4319 N |
2536 | } |
2537 | ||
fd39ca9a | 2538 | static time_t |
1da177e4 LT |
2539 | nfs4_laundromat(void) |
2540 | { | |
2541 | struct nfs4_client *clp; | |
2542 | struct nfs4_stateowner *sop; | |
2543 | struct nfs4_delegation *dp; | |
2544 | struct list_head *pos, *next, reaplist; | |
cf07d2ea BF |
2545 | time_t cutoff = get_seconds() - nfsd4_lease; |
2546 | time_t t, clientid_val = nfsd4_lease; | |
2547 | time_t u, test_val = nfsd4_lease; | |
1da177e4 LT |
2548 | |
2549 | nfs4_lock_state(); | |
2550 | ||
2551 | dprintk("NFSD: laundromat service - starting\n"); | |
af558e33 BF |
2552 | if (locks_in_grace()) |
2553 | nfsd4_end_grace(); | |
1da177e4 LT |
2554 | list_for_each_safe(pos, next, &client_lru) { |
2555 | clp = list_entry(pos, struct nfs4_client, cl_lru); | |
2556 | if (time_after((unsigned long)clp->cl_time, (unsigned long)cutoff)) { | |
2557 | t = clp->cl_time - cutoff; | |
2558 | if (clientid_val > t) | |
2559 | clientid_val = t; | |
2560 | break; | |
2561 | } | |
2562 | dprintk("NFSD: purging unused client (clientid %08x)\n", | |
2563 | clp->cl_clientid.cl_id); | |
c7b9a459 | 2564 | nfsd4_remove_clid_dir(clp); |
1da177e4 LT |
2565 | expire_client(clp); |
2566 | } | |
2567 | INIT_LIST_HEAD(&reaplist); | |
2568 | spin_lock(&recall_lock); | |
2569 | list_for_each_safe(pos, next, &del_recall_lru) { | |
2570 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2571 | if (time_after((unsigned long)dp->dl_time, (unsigned long)cutoff)) { | |
2572 | u = dp->dl_time - cutoff; | |
2573 | if (test_val > u) | |
2574 | test_val = u; | |
2575 | break; | |
2576 | } | |
2577 | dprintk("NFSD: purging unused delegation dp %p, fp %p\n", | |
2578 | dp, dp->dl_flock); | |
2579 | list_move(&dp->dl_recall_lru, &reaplist); | |
2580 | } | |
2581 | spin_unlock(&recall_lock); | |
2582 | list_for_each_safe(pos, next, &reaplist) { | |
2583 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
2584 | list_del_init(&dp->dl_recall_lru); | |
2585 | unhash_delegation(dp); | |
2586 | } | |
cf07d2ea | 2587 | test_val = nfsd4_lease; |
1da177e4 LT |
2588 | list_for_each_safe(pos, next, &close_lru) { |
2589 | sop = list_entry(pos, struct nfs4_stateowner, so_close_lru); | |
2590 | if (time_after((unsigned long)sop->so_time, (unsigned long)cutoff)) { | |
2591 | u = sop->so_time - cutoff; | |
2592 | if (test_val > u) | |
2593 | test_val = u; | |
2594 | break; | |
2595 | } | |
2596 | dprintk("NFSD: purging unused open stateowner (so_id %d)\n", | |
2597 | sop->so_id); | |
f044ff83 | 2598 | release_openowner(sop); |
1da177e4 LT |
2599 | } |
2600 | if (clientid_val < NFSD_LAUNDROMAT_MINTIMEOUT) | |
2601 | clientid_val = NFSD_LAUNDROMAT_MINTIMEOUT; | |
2602 | nfs4_unlock_state(); | |
2603 | return clientid_val; | |
2604 | } | |
2605 | ||
a254b246 HH |
2606 | static struct workqueue_struct *laundry_wq; |
2607 | static void laundromat_main(struct work_struct *); | |
2608 | static DECLARE_DELAYED_WORK(laundromat_work, laundromat_main); | |
2609 | ||
2610 | static void | |
c4028958 | 2611 | laundromat_main(struct work_struct *not_used) |
1da177e4 LT |
2612 | { |
2613 | time_t t; | |
2614 | ||
2615 | t = nfs4_laundromat(); | |
2616 | dprintk("NFSD: laundromat_main - sleeping for %ld seconds\n", t); | |
58da282b | 2617 | queue_delayed_work(laundry_wq, &laundromat_work, t*HZ); |
1da177e4 LT |
2618 | } |
2619 | ||
fd39ca9a | 2620 | static struct nfs4_stateowner * |
f8816512 N |
2621 | search_close_lru(u32 st_id, int flags) |
2622 | { | |
1da177e4 LT |
2623 | struct nfs4_stateowner *local = NULL; |
2624 | ||
1da177e4 LT |
2625 | if (flags & CLOSE_STATE) { |
2626 | list_for_each_entry(local, &close_lru, so_close_lru) { | |
2627 | if (local->so_id == st_id) | |
2628 | return local; | |
2629 | } | |
2630 | } | |
2631 | return NULL; | |
2632 | } | |
2633 | ||
2634 | static inline int | |
2635 | nfs4_check_fh(struct svc_fh *fhp, struct nfs4_stateid *stp) | |
2636 | { | |
7eaa36e2 | 2637 | return fhp->fh_dentry->d_inode != stp->st_vfs_file->f_path.dentry->d_inode; |
1da177e4 LT |
2638 | } |
2639 | ||
2640 | static int | |
2641 | STALE_STATEID(stateid_t *stateid) | |
2642 | { | |
78155ed7 BN |
2643 | if (time_after((unsigned long)boot_time, |
2644 | (unsigned long)stateid->si_boot)) { | |
8c10cbdb BH |
2645 | dprintk("NFSD: stale stateid " STATEID_FMT "!\n", |
2646 | STATEID_VAL(stateid)); | |
78155ed7 BN |
2647 | return 1; |
2648 | } | |
2649 | return 0; | |
2650 | } | |
2651 | ||
2652 | static int | |
2653 | EXPIRED_STATEID(stateid_t *stateid) | |
2654 | { | |
2655 | if (time_before((unsigned long)boot_time, | |
2656 | ((unsigned long)stateid->si_boot)) && | |
cf07d2ea | 2657 | time_before((unsigned long)(stateid->si_boot + nfsd4_lease), get_seconds())) { |
8c10cbdb BH |
2658 | dprintk("NFSD: expired stateid " STATEID_FMT "!\n", |
2659 | STATEID_VAL(stateid)); | |
78155ed7 BN |
2660 | return 1; |
2661 | } | |
2662 | return 0; | |
2663 | } | |
2664 | ||
2665 | static __be32 | |
2666 | stateid_error_map(stateid_t *stateid) | |
2667 | { | |
2668 | if (STALE_STATEID(stateid)) | |
2669 | return nfserr_stale_stateid; | |
2670 | if (EXPIRED_STATEID(stateid)) | |
2671 | return nfserr_expired; | |
2672 | ||
8c10cbdb BH |
2673 | dprintk("NFSD: bad stateid " STATEID_FMT "!\n", |
2674 | STATEID_VAL(stateid)); | |
78155ed7 | 2675 | return nfserr_bad_stateid; |
1da177e4 LT |
2676 | } |
2677 | ||
2678 | static inline int | |
2679 | access_permit_read(unsigned long access_bmap) | |
2680 | { | |
2681 | return test_bit(NFS4_SHARE_ACCESS_READ, &access_bmap) || | |
2682 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap) || | |
2683 | test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap); | |
2684 | } | |
2685 | ||
2686 | static inline int | |
2687 | access_permit_write(unsigned long access_bmap) | |
2688 | { | |
2689 | return test_bit(NFS4_SHARE_ACCESS_WRITE, &access_bmap) || | |
2690 | test_bit(NFS4_SHARE_ACCESS_BOTH, &access_bmap); | |
2691 | } | |
2692 | ||
2693 | static | |
b37ad28b | 2694 | __be32 nfs4_check_openmode(struct nfs4_stateid *stp, int flags) |
1da177e4 | 2695 | { |
b37ad28b | 2696 | __be32 status = nfserr_openmode; |
1da177e4 LT |
2697 | |
2698 | if ((flags & WR_STATE) && (!access_permit_write(stp->st_access_bmap))) | |
2699 | goto out; | |
2700 | if ((flags & RD_STATE) && (!access_permit_read(stp->st_access_bmap))) | |
2701 | goto out; | |
2702 | status = nfs_ok; | |
2703 | out: | |
2704 | return status; | |
2705 | } | |
2706 | ||
b37ad28b | 2707 | static inline __be32 |
1da177e4 LT |
2708 | check_special_stateids(svc_fh *current_fh, stateid_t *stateid, int flags) |
2709 | { | |
203a8c8e | 2710 | if (ONE_STATEID(stateid) && (flags & RD_STATE)) |
1da177e4 | 2711 | return nfs_ok; |
af558e33 | 2712 | else if (locks_in_grace()) { |
1da177e4 LT |
2713 | /* Answer in remaining cases depends on existance of |
2714 | * conflicting state; so we must wait out the grace period. */ | |
2715 | return nfserr_grace; | |
2716 | } else if (flags & WR_STATE) | |
2717 | return nfs4_share_conflict(current_fh, | |
2718 | NFS4_SHARE_DENY_WRITE); | |
2719 | else /* (flags & RD_STATE) && ZERO_STATEID(stateid) */ | |
2720 | return nfs4_share_conflict(current_fh, | |
2721 | NFS4_SHARE_DENY_READ); | |
2722 | } | |
2723 | ||
2724 | /* | |
2725 | * Allow READ/WRITE during grace period on recovered state only for files | |
2726 | * that are not able to provide mandatory locking. | |
2727 | */ | |
2728 | static inline int | |
18f82731 | 2729 | grace_disallows_io(struct inode *inode) |
1da177e4 | 2730 | { |
203a8c8e | 2731 | return locks_in_grace() && mandatory_lock(inode); |
1da177e4 LT |
2732 | } |
2733 | ||
6668958f | 2734 | static int check_stateid_generation(stateid_t *in, stateid_t *ref, int flags) |
0836f587 | 2735 | { |
6668958f AA |
2736 | /* |
2737 | * When sessions are used the stateid generation number is ignored | |
2738 | * when it is zero. | |
2739 | */ | |
2740 | if ((flags & HAS_SESSION) && in->si_generation == 0) | |
2741 | goto out; | |
2742 | ||
0836f587 BF |
2743 | /* If the client sends us a stateid from the future, it's buggy: */ |
2744 | if (in->si_generation > ref->si_generation) | |
2745 | return nfserr_bad_stateid; | |
2746 | /* | |
2747 | * The following, however, can happen. For example, if the | |
2748 | * client sends an open and some IO at the same time, the open | |
2749 | * may bump si_generation while the IO is still in flight. | |
2750 | * Thanks to hard links and renames, the client never knows what | |
2751 | * file an open will affect. So it could avoid that situation | |
2752 | * only by serializing all opens and IO from the same open | |
2753 | * owner. To recover from the old_stateid error, the client | |
2754 | * will just have to retry the IO: | |
2755 | */ | |
2756 | if (in->si_generation < ref->si_generation) | |
2757 | return nfserr_old_stateid; | |
6668958f | 2758 | out: |
0836f587 BF |
2759 | return nfs_ok; |
2760 | } | |
2761 | ||
3e633079 BF |
2762 | static int is_delegation_stateid(stateid_t *stateid) |
2763 | { | |
2764 | return stateid->si_fileid == 0; | |
2765 | } | |
2766 | ||
1da177e4 LT |
2767 | /* |
2768 | * Checks for stateid operations | |
2769 | */ | |
b37ad28b | 2770 | __be32 |
dd453dfd BH |
2771 | nfs4_preprocess_stateid_op(struct nfsd4_compound_state *cstate, |
2772 | stateid_t *stateid, int flags, struct file **filpp) | |
1da177e4 LT |
2773 | { |
2774 | struct nfs4_stateid *stp = NULL; | |
2775 | struct nfs4_delegation *dp = NULL; | |
dd453dfd | 2776 | struct svc_fh *current_fh = &cstate->current_fh; |
1da177e4 | 2777 | struct inode *ino = current_fh->fh_dentry->d_inode; |
b37ad28b | 2778 | __be32 status; |
1da177e4 | 2779 | |
1da177e4 LT |
2780 | if (filpp) |
2781 | *filpp = NULL; | |
2782 | ||
18f82731 | 2783 | if (grace_disallows_io(ino)) |
1da177e4 LT |
2784 | return nfserr_grace; |
2785 | ||
6668958f AA |
2786 | if (nfsd4_has_session(cstate)) |
2787 | flags |= HAS_SESSION; | |
2788 | ||
1da177e4 LT |
2789 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) |
2790 | return check_special_stateids(current_fh, stateid, flags); | |
2791 | ||
1da177e4 LT |
2792 | status = nfserr_stale_stateid; |
2793 | if (STALE_STATEID(stateid)) | |
2794 | goto out; | |
2795 | ||
1da177e4 | 2796 | status = nfserr_bad_stateid; |
3e633079 | 2797 | if (is_delegation_stateid(stateid)) { |
a4455be0 | 2798 | dp = find_delegation_stateid(ino, stateid); |
78155ed7 BN |
2799 | if (!dp) { |
2800 | status = stateid_error_map(stateid); | |
1da177e4 | 2801 | goto out; |
78155ed7 | 2802 | } |
6668958f AA |
2803 | status = check_stateid_generation(stateid, &dp->dl_stateid, |
2804 | flags); | |
0c2a498f BF |
2805 | if (status) |
2806 | goto out; | |
dc9bf700 BF |
2807 | status = nfs4_check_delegmode(dp, flags); |
2808 | if (status) | |
2809 | goto out; | |
2810 | renew_client(dp->dl_client); | |
dc9bf700 BF |
2811 | if (filpp) |
2812 | *filpp = dp->dl_vfs_file; | |
1da177e4 | 2813 | } else { /* open or lock stateid */ |
a4455be0 | 2814 | stp = find_stateid(stateid, flags); |
78155ed7 BN |
2815 | if (!stp) { |
2816 | status = stateid_error_map(stateid); | |
1da177e4 | 2817 | goto out; |
78155ed7 | 2818 | } |
6150ef0d | 2819 | if (nfs4_check_fh(current_fh, stp)) |
1da177e4 LT |
2820 | goto out; |
2821 | if (!stp->st_stateowner->so_confirmed) | |
2822 | goto out; | |
6668958f AA |
2823 | status = check_stateid_generation(stateid, &stp->st_stateid, |
2824 | flags); | |
0c2a498f BF |
2825 | if (status) |
2826 | goto out; | |
a4455be0 BF |
2827 | status = nfs4_check_openmode(stp, flags); |
2828 | if (status) | |
1da177e4 LT |
2829 | goto out; |
2830 | renew_client(stp->st_stateowner->so_client); | |
2831 | if (filpp) | |
2832 | *filpp = stp->st_vfs_file; | |
1da177e4 LT |
2833 | } |
2834 | status = nfs_ok; | |
2835 | out: | |
2836 | return status; | |
2837 | } | |
2838 | ||
4c4cd222 N |
2839 | static inline int |
2840 | setlkflg (int type) | |
2841 | { | |
2842 | return (type == NFS4_READW_LT || type == NFS4_READ_LT) ? | |
2843 | RD_STATE : WR_STATE; | |
2844 | } | |
1da177e4 LT |
2845 | |
2846 | /* | |
2847 | * Checks for sequence id mutating operations. | |
2848 | */ | |
b37ad28b | 2849 | static __be32 |
dd453dfd BH |
2850 | nfs4_preprocess_seqid_op(struct nfsd4_compound_state *cstate, u32 seqid, |
2851 | stateid_t *stateid, int flags, | |
2852 | struct nfs4_stateowner **sopp, | |
2853 | struct nfs4_stateid **stpp, struct nfsd4_lock *lock) | |
1da177e4 | 2854 | { |
1da177e4 LT |
2855 | struct nfs4_stateid *stp; |
2856 | struct nfs4_stateowner *sop; | |
dd453dfd | 2857 | struct svc_fh *current_fh = &cstate->current_fh; |
0836f587 | 2858 | __be32 status; |
1da177e4 | 2859 | |
8c10cbdb BH |
2860 | dprintk("NFSD: %s: seqid=%d stateid = " STATEID_FMT "\n", __func__, |
2861 | seqid, STATEID_VAL(stateid)); | |
3a4f98bb | 2862 | |
1da177e4 LT |
2863 | *stpp = NULL; |
2864 | *sopp = NULL; | |
2865 | ||
1da177e4 | 2866 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) { |
2fdada03 | 2867 | dprintk("NFSD: preprocess_seqid_op: magic stateid!\n"); |
3a4f98bb | 2868 | return nfserr_bad_stateid; |
1da177e4 LT |
2869 | } |
2870 | ||
1da177e4 | 2871 | if (STALE_STATEID(stateid)) |
3a4f98bb | 2872 | return nfserr_stale_stateid; |
6668958f AA |
2873 | |
2874 | if (nfsd4_has_session(cstate)) | |
2875 | flags |= HAS_SESSION; | |
2876 | ||
1da177e4 LT |
2877 | /* |
2878 | * We return BAD_STATEID if filehandle doesn't match stateid, | |
2879 | * the confirmed flag is incorrecly set, or the generation | |
2880 | * number is incorrect. | |
1da177e4 | 2881 | */ |
f8816512 N |
2882 | stp = find_stateid(stateid, flags); |
2883 | if (stp == NULL) { | |
2884 | /* | |
2885 | * Also, we should make sure this isn't just the result of | |
2886 | * a replayed close: | |
2887 | */ | |
2888 | sop = search_close_lru(stateid->si_stateownerid, flags); | |
2889 | if (sop == NULL) | |
78155ed7 | 2890 | return stateid_error_map(stateid); |
f8816512 N |
2891 | *sopp = sop; |
2892 | goto check_replay; | |
2893 | } | |
1da177e4 | 2894 | |
39325bd0 BF |
2895 | *stpp = stp; |
2896 | *sopp = sop = stp->st_stateowner; | |
2897 | ||
4c4cd222 | 2898 | if (lock) { |
4c4cd222 | 2899 | clientid_t *lockclid = &lock->v.new.clientid; |
1da177e4 | 2900 | struct nfs4_client *clp = sop->so_client; |
4c4cd222 | 2901 | int lkflg = 0; |
b37ad28b | 2902 | __be32 status; |
4c4cd222 N |
2903 | |
2904 | lkflg = setlkflg(lock->lk_type); | |
2905 | ||
2906 | if (lock->lk_is_new) { | |
599e0a22 BF |
2907 | if (!sop->so_is_open_owner) |
2908 | return nfserr_bad_stateid; | |
60adfc50 AA |
2909 | if (!(flags & HAS_SESSION) && |
2910 | !same_clid(&clp->cl_clientid, lockclid)) | |
2911 | return nfserr_bad_stateid; | |
599e0a22 BF |
2912 | /* stp is the open stateid */ |
2913 | status = nfs4_check_openmode(stp, lkflg); | |
2914 | if (status) | |
2915 | return status; | |
2916 | } else { | |
2917 | /* stp is the lock stateid */ | |
2918 | status = nfs4_check_openmode(stp->st_openstp, lkflg); | |
2919 | if (status) | |
2920 | return status; | |
4c4cd222 | 2921 | } |
1da177e4 LT |
2922 | } |
2923 | ||
f3362737 | 2924 | if (nfs4_check_fh(current_fh, stp)) { |
2fdada03 | 2925 | dprintk("NFSD: preprocess_seqid_op: fh-stateid mismatch!\n"); |
3a4f98bb | 2926 | return nfserr_bad_stateid; |
1da177e4 LT |
2927 | } |
2928 | ||
1da177e4 LT |
2929 | /* |
2930 | * We now validate the seqid and stateid generation numbers. | |
2931 | * For the moment, we ignore the possibility of | |
2932 | * generation number wraparound. | |
2933 | */ | |
6668958f | 2934 | if (!(flags & HAS_SESSION) && seqid != sop->so_seqid) |
1da177e4 LT |
2935 | goto check_replay; |
2936 | ||
3a4f98bb | 2937 | if (sop->so_confirmed && flags & CONFIRM) { |
2fdada03 | 2938 | dprintk("NFSD: preprocess_seqid_op: expected" |
3a4f98bb N |
2939 | " unconfirmed stateowner!\n"); |
2940 | return nfserr_bad_stateid; | |
1da177e4 | 2941 | } |
3a4f98bb | 2942 | if (!sop->so_confirmed && !(flags & CONFIRM)) { |
2fdada03 | 2943 | dprintk("NFSD: preprocess_seqid_op: stateowner not" |
3a4f98bb N |
2944 | " confirmed yet!\n"); |
2945 | return nfserr_bad_stateid; | |
1da177e4 | 2946 | } |
6668958f | 2947 | status = check_stateid_generation(stateid, &stp->st_stateid, flags); |
0836f587 BF |
2948 | if (status) |
2949 | return status; | |
52fd004e | 2950 | renew_client(sop->so_client); |
3a4f98bb | 2951 | return nfs_ok; |
1da177e4 | 2952 | |
1da177e4 | 2953 | check_replay: |
bd9aac52 | 2954 | if (seqid == sop->so_seqid - 1) { |
849823c5 | 2955 | dprintk("NFSD: preprocess_seqid_op: retransmission?\n"); |
1da177e4 | 2956 | /* indicate replay to calling function */ |
a90b061c | 2957 | return nfserr_replay_me; |
1da177e4 | 2958 | } |
2fdada03 | 2959 | dprintk("NFSD: preprocess_seqid_op: bad seqid (expected %d, got %d)\n", |
3a4f98bb N |
2960 | sop->so_seqid, seqid); |
2961 | *sopp = NULL; | |
2962 | return nfserr_bad_seqid; | |
1da177e4 LT |
2963 | } |
2964 | ||
b37ad28b | 2965 | __be32 |
ca364317 | 2966 | nfsd4_open_confirm(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 2967 | struct nfsd4_open_confirm *oc) |
1da177e4 | 2968 | { |
b37ad28b | 2969 | __be32 status; |
1da177e4 LT |
2970 | struct nfs4_stateowner *sop; |
2971 | struct nfs4_stateid *stp; | |
2972 | ||
2973 | dprintk("NFSD: nfsd4_open_confirm on file %.*s\n", | |
ca364317 BF |
2974 | (int)cstate->current_fh.fh_dentry->d_name.len, |
2975 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 2976 | |
ca364317 | 2977 | status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0); |
a8cddc5d BF |
2978 | if (status) |
2979 | return status; | |
1da177e4 LT |
2980 | |
2981 | nfs4_lock_state(); | |
2982 | ||
dd453dfd | 2983 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 2984 | oc->oc_seqid, &oc->oc_req_stateid, |
f3362737 | 2985 | CONFIRM | OPEN_STATE, |
1da177e4 LT |
2986 | &oc->oc_stateowner, &stp, NULL))) |
2987 | goto out; | |
2988 | ||
2989 | sop = oc->oc_stateowner; | |
2990 | sop->so_confirmed = 1; | |
2991 | update_stateid(&stp->st_stateid); | |
2992 | memcpy(&oc->oc_resp_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
8c10cbdb BH |
2993 | dprintk("NFSD: %s: success, seqid=%d stateid=" STATEID_FMT "\n", |
2994 | __func__, oc->oc_seqid, STATEID_VAL(&stp->st_stateid)); | |
c7b9a459 N |
2995 | |
2996 | nfsd4_create_clid_dir(sop->so_client); | |
1da177e4 | 2997 | out: |
f2327d9a | 2998 | if (oc->oc_stateowner) { |
1da177e4 | 2999 | nfs4_get_stateowner(oc->oc_stateowner); |
a4f1706a | 3000 | cstate->replay_owner = oc->oc_stateowner; |
f2327d9a | 3001 | } |
1da177e4 LT |
3002 | nfs4_unlock_state(); |
3003 | return status; | |
3004 | } | |
3005 | ||
3006 | ||
3007 | /* | |
3008 | * unset all bits in union bitmap (bmap) that | |
3009 | * do not exist in share (from successful OPEN_DOWNGRADE) | |
3010 | */ | |
3011 | static void | |
3012 | reset_union_bmap_access(unsigned long access, unsigned long *bmap) | |
3013 | { | |
3014 | int i; | |
3015 | for (i = 1; i < 4; i++) { | |
3016 | if ((i & access) != i) | |
3017 | __clear_bit(i, bmap); | |
3018 | } | |
3019 | } | |
3020 | ||
3021 | static void | |
3022 | reset_union_bmap_deny(unsigned long deny, unsigned long *bmap) | |
3023 | { | |
3024 | int i; | |
3025 | for (i = 0; i < 4; i++) { | |
3026 | if ((i & deny) != i) | |
3027 | __clear_bit(i, bmap); | |
3028 | } | |
3029 | } | |
3030 | ||
b37ad28b | 3031 | __be32 |
ca364317 BF |
3032 | nfsd4_open_downgrade(struct svc_rqst *rqstp, |
3033 | struct nfsd4_compound_state *cstate, | |
a4f1706a | 3034 | struct nfsd4_open_downgrade *od) |
1da177e4 | 3035 | { |
b37ad28b | 3036 | __be32 status; |
1da177e4 LT |
3037 | struct nfs4_stateid *stp; |
3038 | unsigned int share_access; | |
3039 | ||
3040 | dprintk("NFSD: nfsd4_open_downgrade on file %.*s\n", | |
ca364317 BF |
3041 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3042 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 | 3043 | |
d87a8ade | 3044 | if (!access_valid(od->od_share_access, cstate->minorversion) |
ba5a6a19 | 3045 | || !deny_valid(od->od_share_deny)) |
1da177e4 LT |
3046 | return nfserr_inval; |
3047 | ||
3048 | nfs4_lock_state(); | |
dd453dfd | 3049 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3050 | od->od_seqid, |
1da177e4 | 3051 | &od->od_stateid, |
f3362737 | 3052 | OPEN_STATE, |
1da177e4 LT |
3053 | &od->od_stateowner, &stp, NULL))) |
3054 | goto out; | |
3055 | ||
3056 | status = nfserr_inval; | |
3057 | if (!test_bit(od->od_share_access, &stp->st_access_bmap)) { | |
3058 | dprintk("NFSD:access not a subset current bitmap: 0x%lx, input access=%08x\n", | |
3059 | stp->st_access_bmap, od->od_share_access); | |
3060 | goto out; | |
3061 | } | |
3062 | if (!test_bit(od->od_share_deny, &stp->st_deny_bmap)) { | |
3063 | dprintk("NFSD:deny not a subset current bitmap: 0x%lx, input deny=%08x\n", | |
3064 | stp->st_deny_bmap, od->od_share_deny); | |
3065 | goto out; | |
3066 | } | |
3067 | set_access(&share_access, stp->st_access_bmap); | |
3068 | nfs4_file_downgrade(stp->st_vfs_file, | |
3069 | share_access & ~od->od_share_access); | |
3070 | ||
3071 | reset_union_bmap_access(od->od_share_access, &stp->st_access_bmap); | |
3072 | reset_union_bmap_deny(od->od_share_deny, &stp->st_deny_bmap); | |
3073 | ||
3074 | update_stateid(&stp->st_stateid); | |
3075 | memcpy(&od->od_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3076 | status = nfs_ok; | |
3077 | out: | |
f2327d9a | 3078 | if (od->od_stateowner) { |
1da177e4 | 3079 | nfs4_get_stateowner(od->od_stateowner); |
a4f1706a | 3080 | cstate->replay_owner = od->od_stateowner; |
f2327d9a | 3081 | } |
1da177e4 LT |
3082 | nfs4_unlock_state(); |
3083 | return status; | |
3084 | } | |
3085 | ||
3086 | /* | |
3087 | * nfs4_unlock_state() called after encode | |
3088 | */ | |
b37ad28b | 3089 | __be32 |
ca364317 | 3090 | nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3091 | struct nfsd4_close *close) |
1da177e4 | 3092 | { |
b37ad28b | 3093 | __be32 status; |
1da177e4 LT |
3094 | struct nfs4_stateid *stp; |
3095 | ||
3096 | dprintk("NFSD: nfsd4_close on file %.*s\n", | |
ca364317 BF |
3097 | (int)cstate->current_fh.fh_dentry->d_name.len, |
3098 | cstate->current_fh.fh_dentry->d_name.name); | |
1da177e4 LT |
3099 | |
3100 | nfs4_lock_state(); | |
3101 | /* check close_lru for replay */ | |
dd453dfd | 3102 | if ((status = nfs4_preprocess_seqid_op(cstate, |
ca364317 | 3103 | close->cl_seqid, |
1da177e4 | 3104 | &close->cl_stateid, |
f3362737 | 3105 | OPEN_STATE | CLOSE_STATE, |
1da177e4 LT |
3106 | &close->cl_stateowner, &stp, NULL))) |
3107 | goto out; | |
1da177e4 LT |
3108 | status = nfs_ok; |
3109 | update_stateid(&stp->st_stateid); | |
3110 | memcpy(&close->cl_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3111 | ||
04ef5954 | 3112 | /* release_stateid() calls nfsd_close() if needed */ |
2283963f | 3113 | release_open_stateid(stp); |
04ef5954 BF |
3114 | |
3115 | /* place unused nfs4_stateowners on so_close_lru list to be | |
3116 | * released by the laundromat service after the lease period | |
3117 | * to enable us to handle CLOSE replay | |
3118 | */ | |
3119 | if (list_empty(&close->cl_stateowner->so_stateids)) | |
3120 | move_to_close_lru(close->cl_stateowner); | |
1da177e4 | 3121 | out: |
f2327d9a | 3122 | if (close->cl_stateowner) { |
1da177e4 | 3123 | nfs4_get_stateowner(close->cl_stateowner); |
a4f1706a | 3124 | cstate->replay_owner = close->cl_stateowner; |
f2327d9a | 3125 | } |
1da177e4 LT |
3126 | nfs4_unlock_state(); |
3127 | return status; | |
3128 | } | |
3129 | ||
b37ad28b | 3130 | __be32 |
ca364317 BF |
3131 | nfsd4_delegreturn(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3132 | struct nfsd4_delegreturn *dr) | |
1da177e4 | 3133 | { |
203a8c8e BF |
3134 | struct nfs4_delegation *dp; |
3135 | stateid_t *stateid = &dr->dr_stateid; | |
3136 | struct inode *inode; | |
b37ad28b | 3137 | __be32 status; |
6668958f | 3138 | int flags = 0; |
1da177e4 | 3139 | |
ca364317 | 3140 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) |
203a8c8e BF |
3141 | return status; |
3142 | inode = cstate->current_fh.fh_dentry->d_inode; | |
1da177e4 | 3143 | |
6668958f AA |
3144 | if (nfsd4_has_session(cstate)) |
3145 | flags |= HAS_SESSION; | |
1da177e4 | 3146 | nfs4_lock_state(); |
203a8c8e BF |
3147 | status = nfserr_bad_stateid; |
3148 | if (ZERO_STATEID(stateid) || ONE_STATEID(stateid)) | |
3149 | goto out; | |
3150 | status = nfserr_stale_stateid; | |
3151 | if (STALE_STATEID(stateid)) | |
3152 | goto out; | |
7e0f7cf5 | 3153 | status = nfserr_bad_stateid; |
203a8c8e BF |
3154 | if (!is_delegation_stateid(stateid)) |
3155 | goto out; | |
203a8c8e | 3156 | dp = find_delegation_stateid(inode, stateid); |
78155ed7 BN |
3157 | if (!dp) { |
3158 | status = stateid_error_map(stateid); | |
203a8c8e | 3159 | goto out; |
78155ed7 | 3160 | } |
6668958f | 3161 | status = check_stateid_generation(stateid, &dp->dl_stateid, flags); |
203a8c8e BF |
3162 | if (status) |
3163 | goto out; | |
3164 | renew_client(dp->dl_client); | |
3165 | ||
3166 | unhash_delegation(dp); | |
1da177e4 | 3167 | out: |
203a8c8e BF |
3168 | nfs4_unlock_state(); |
3169 | ||
1da177e4 LT |
3170 | return status; |
3171 | } | |
3172 | ||
3173 | ||
3174 | /* | |
3175 | * Lock owner state (byte-range locks) | |
3176 | */ | |
3177 | #define LOFF_OVERFLOW(start, len) ((u64)(len) > ~(u64)(start)) | |
3178 | #define LOCK_HASH_BITS 8 | |
3179 | #define LOCK_HASH_SIZE (1 << LOCK_HASH_BITS) | |
3180 | #define LOCK_HASH_MASK (LOCK_HASH_SIZE - 1) | |
3181 | ||
87df4de8 BH |
3182 | static inline u64 |
3183 | end_offset(u64 start, u64 len) | |
3184 | { | |
3185 | u64 end; | |
3186 | ||
3187 | end = start + len; | |
3188 | return end >= start ? end: NFS4_MAX_UINT64; | |
3189 | } | |
3190 | ||
3191 | /* last octet in a range */ | |
3192 | static inline u64 | |
3193 | last_byte_offset(u64 start, u64 len) | |
3194 | { | |
3195 | u64 end; | |
3196 | ||
3197 | BUG_ON(!len); | |
3198 | end = start + len; | |
3199 | return end > start ? end - 1: NFS4_MAX_UINT64; | |
3200 | } | |
3201 | ||
1da177e4 LT |
3202 | #define lockownerid_hashval(id) \ |
3203 | ((id) & LOCK_HASH_MASK) | |
3204 | ||
3205 | static inline unsigned int | |
3206 | lock_ownerstr_hashval(struct inode *inode, u32 cl_id, | |
3207 | struct xdr_netobj *ownername) | |
3208 | { | |
3209 | return (file_hashval(inode) + cl_id | |
3210 | + opaque_hashval(ownername->data, ownername->len)) | |
3211 | & LOCK_HASH_MASK; | |
3212 | } | |
3213 | ||
3214 | static struct list_head lock_ownerid_hashtbl[LOCK_HASH_SIZE]; | |
3215 | static struct list_head lock_ownerstr_hashtbl[LOCK_HASH_SIZE]; | |
3216 | static struct list_head lockstateid_hashtbl[STATEID_HASH_SIZE]; | |
3217 | ||
fd39ca9a | 3218 | static struct nfs4_stateid * |
1da177e4 LT |
3219 | find_stateid(stateid_t *stid, int flags) |
3220 | { | |
9346eff0 | 3221 | struct nfs4_stateid *local; |
1da177e4 LT |
3222 | u32 st_id = stid->si_stateownerid; |
3223 | u32 f_id = stid->si_fileid; | |
3224 | unsigned int hashval; | |
3225 | ||
3226 | dprintk("NFSD: find_stateid flags 0x%x\n",flags); | |
9346eff0 | 3227 | if (flags & (LOCK_STATE | RD_STATE | WR_STATE)) { |
1da177e4 LT |
3228 | hashval = stateid_hashval(st_id, f_id); |
3229 | list_for_each_entry(local, &lockstateid_hashtbl[hashval], st_hash) { | |
3230 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3231 | (local->st_stateid.si_fileid == f_id)) | |
3232 | return local; | |
3233 | } | |
3234 | } | |
9346eff0 KK |
3235 | |
3236 | if (flags & (OPEN_STATE | RD_STATE | WR_STATE)) { | |
1da177e4 LT |
3237 | hashval = stateid_hashval(st_id, f_id); |
3238 | list_for_each_entry(local, &stateid_hashtbl[hashval], st_hash) { | |
3239 | if ((local->st_stateid.si_stateownerid == st_id) && | |
3240 | (local->st_stateid.si_fileid == f_id)) | |
3241 | return local; | |
3242 | } | |
849823c5 | 3243 | } |
1da177e4 LT |
3244 | return NULL; |
3245 | } | |
3246 | ||
3247 | static struct nfs4_delegation * | |
3248 | find_delegation_stateid(struct inode *ino, stateid_t *stid) | |
3249 | { | |
13cd2184 N |
3250 | struct nfs4_file *fp; |
3251 | struct nfs4_delegation *dl; | |
1da177e4 | 3252 | |
8c10cbdb BH |
3253 | dprintk("NFSD: %s: stateid=" STATEID_FMT "\n", __func__, |
3254 | STATEID_VAL(stid)); | |
1da177e4 | 3255 | |
1da177e4 | 3256 | fp = find_file(ino); |
13cd2184 N |
3257 | if (!fp) |
3258 | return NULL; | |
3259 | dl = find_delegation_file(fp, stid); | |
3260 | put_nfs4_file(fp); | |
3261 | return dl; | |
1da177e4 LT |
3262 | } |
3263 | ||
3264 | /* | |
3265 | * TODO: Linux file offsets are _signed_ 64-bit quantities, which means that | |
3266 | * we can't properly handle lock requests that go beyond the (2^63 - 1)-th | |
3267 | * byte, because of sign extension problems. Since NFSv4 calls for 64-bit | |
3268 | * locking, this prevents us from being completely protocol-compliant. The | |
3269 | * real solution to this problem is to start using unsigned file offsets in | |
3270 | * the VFS, but this is a very deep change! | |
3271 | */ | |
3272 | static inline void | |
3273 | nfs4_transform_lock_offset(struct file_lock *lock) | |
3274 | { | |
3275 | if (lock->fl_start < 0) | |
3276 | lock->fl_start = OFFSET_MAX; | |
3277 | if (lock->fl_end < 0) | |
3278 | lock->fl_end = OFFSET_MAX; | |
3279 | } | |
3280 | ||
d5b9026a N |
3281 | /* Hack!: For now, we're defining this just so we can use a pointer to it |
3282 | * as a unique cookie to identify our (NFSv4's) posix locks. */ | |
7b021967 | 3283 | static const struct lock_manager_operations nfsd_posix_mng_ops = { |
d5b9026a | 3284 | }; |
1da177e4 LT |
3285 | |
3286 | static inline void | |
3287 | nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny) | |
3288 | { | |
d5b9026a N |
3289 | struct nfs4_stateowner *sop; |
3290 | unsigned int hval; | |
1da177e4 | 3291 | |
d5b9026a N |
3292 | if (fl->fl_lmops == &nfsd_posix_mng_ops) { |
3293 | sop = (struct nfs4_stateowner *) fl->fl_owner; | |
3294 | hval = lockownerid_hashval(sop->so_id); | |
1da177e4 LT |
3295 | kref_get(&sop->so_ref); |
3296 | deny->ld_sop = sop; | |
3297 | deny->ld_clientid = sop->so_client->cl_clientid; | |
d5b9026a N |
3298 | } else { |
3299 | deny->ld_sop = NULL; | |
3300 | deny->ld_clientid.cl_boot = 0; | |
3301 | deny->ld_clientid.cl_id = 0; | |
1da177e4 LT |
3302 | } |
3303 | deny->ld_start = fl->fl_start; | |
87df4de8 BH |
3304 | deny->ld_length = NFS4_MAX_UINT64; |
3305 | if (fl->fl_end != NFS4_MAX_UINT64) | |
1da177e4 LT |
3306 | deny->ld_length = fl->fl_end - fl->fl_start + 1; |
3307 | deny->ld_type = NFS4_READ_LT; | |
3308 | if (fl->fl_type != F_RDLCK) | |
3309 | deny->ld_type = NFS4_WRITE_LT; | |
3310 | } | |
3311 | ||
1da177e4 LT |
3312 | static struct nfs4_stateowner * |
3313 | find_lockstateowner_str(struct inode *inode, clientid_t *clid, | |
3314 | struct xdr_netobj *owner) | |
3315 | { | |
3316 | unsigned int hashval = lock_ownerstr_hashval(inode, clid->cl_id, owner); | |
3317 | struct nfs4_stateowner *op; | |
3318 | ||
3319 | list_for_each_entry(op, &lock_ownerstr_hashtbl[hashval], so_strhash) { | |
599e0a22 | 3320 | if (same_owner_str(op, owner, clid)) |
1da177e4 LT |
3321 | return op; |
3322 | } | |
3323 | return NULL; | |
3324 | } | |
3325 | ||
3326 | /* | |
3327 | * Alloc a lock owner structure. | |
3328 | * Called in nfsd4_lock - therefore, OPEN and OPEN_CONFIRM (if needed) has | |
3329 | * occured. | |
3330 | * | |
3331 | * strhashval = lock_ownerstr_hashval | |
1da177e4 LT |
3332 | */ |
3333 | ||
3334 | static struct nfs4_stateowner * | |
3335 | alloc_init_lock_stateowner(unsigned int strhashval, struct nfs4_client *clp, struct nfs4_stateid *open_stp, struct nfsd4_lock *lock) { | |
3336 | struct nfs4_stateowner *sop; | |
3337 | struct nfs4_replay *rp; | |
3338 | unsigned int idhashval; | |
3339 | ||
3340 | if (!(sop = alloc_stateowner(&lock->lk_new_owner))) | |
3341 | return NULL; | |
3342 | idhashval = lockownerid_hashval(current_ownerid); | |
3343 | INIT_LIST_HEAD(&sop->so_idhash); | |
3344 | INIT_LIST_HEAD(&sop->so_strhash); | |
3345 | INIT_LIST_HEAD(&sop->so_perclient); | |
ea1da636 N |
3346 | INIT_LIST_HEAD(&sop->so_stateids); |
3347 | INIT_LIST_HEAD(&sop->so_perstateid); | |
1da177e4 LT |
3348 | INIT_LIST_HEAD(&sop->so_close_lru); /* not used */ |
3349 | sop->so_time = 0; | |
3350 | list_add(&sop->so_idhash, &lock_ownerid_hashtbl[idhashval]); | |
3351 | list_add(&sop->so_strhash, &lock_ownerstr_hashtbl[strhashval]); | |
ea1da636 | 3352 | list_add(&sop->so_perstateid, &open_stp->st_lockowners); |
1da177e4 LT |
3353 | sop->so_is_open_owner = 0; |
3354 | sop->so_id = current_ownerid++; | |
3355 | sop->so_client = clp; | |
b59e3c0e NB |
3356 | /* It is the openowner seqid that will be incremented in encode in the |
3357 | * case of new lockowners; so increment the lock seqid manually: */ | |
3358 | sop->so_seqid = lock->lk_new_lock_seqid + 1; | |
1da177e4 LT |
3359 | sop->so_confirmed = 1; |
3360 | rp = &sop->so_replay; | |
de1ae286 | 3361 | rp->rp_status = nfserr_serverfault; |
1da177e4 LT |
3362 | rp->rp_buflen = 0; |
3363 | rp->rp_buf = rp->rp_ibuf; | |
3364 | return sop; | |
3365 | } | |
3366 | ||
fd39ca9a | 3367 | static struct nfs4_stateid * |
1da177e4 LT |
3368 | alloc_init_lock_stateid(struct nfs4_stateowner *sop, struct nfs4_file *fp, struct nfs4_stateid *open_stp) |
3369 | { | |
3370 | struct nfs4_stateid *stp; | |
3371 | unsigned int hashval = stateid_hashval(sop->so_id, fp->fi_id); | |
3372 | ||
5ac049ac N |
3373 | stp = nfs4_alloc_stateid(); |
3374 | if (stp == NULL) | |
1da177e4 LT |
3375 | goto out; |
3376 | INIT_LIST_HEAD(&stp->st_hash); | |
3377 | INIT_LIST_HEAD(&stp->st_perfile); | |
ea1da636 N |
3378 | INIT_LIST_HEAD(&stp->st_perstateowner); |
3379 | INIT_LIST_HEAD(&stp->st_lockowners); /* not used */ | |
1da177e4 | 3380 | list_add(&stp->st_hash, &lockstateid_hashtbl[hashval]); |
8beefa24 | 3381 | list_add(&stp->st_perfile, &fp->fi_stateids); |
ea1da636 | 3382 | list_add(&stp->st_perstateowner, &sop->so_stateids); |
1da177e4 | 3383 | stp->st_stateowner = sop; |
13cd2184 | 3384 | get_nfs4_file(fp); |
1da177e4 | 3385 | stp->st_file = fp; |
78155ed7 | 3386 | stp->st_stateid.si_boot = get_seconds(); |
1da177e4 LT |
3387 | stp->st_stateid.si_stateownerid = sop->so_id; |
3388 | stp->st_stateid.si_fileid = fp->fi_id; | |
3389 | stp->st_stateid.si_generation = 0; | |
3390 | stp->st_vfs_file = open_stp->st_vfs_file; /* FIXME refcount?? */ | |
3391 | stp->st_access_bmap = open_stp->st_access_bmap; | |
3392 | stp->st_deny_bmap = open_stp->st_deny_bmap; | |
4c4cd222 | 3393 | stp->st_openstp = open_stp; |
1da177e4 LT |
3394 | |
3395 | out: | |
3396 | return stp; | |
3397 | } | |
3398 | ||
fd39ca9a | 3399 | static int |
1da177e4 LT |
3400 | check_lock_length(u64 offset, u64 length) |
3401 | { | |
87df4de8 | 3402 | return ((length == 0) || ((length != NFS4_MAX_UINT64) && |
1da177e4 LT |
3403 | LOFF_OVERFLOW(offset, length))); |
3404 | } | |
3405 | ||
3406 | /* | |
3407 | * LOCK operation | |
3408 | */ | |
b37ad28b | 3409 | __be32 |
ca364317 | 3410 | nfsd4_lock(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3411 | struct nfsd4_lock *lock) |
1da177e4 | 3412 | { |
3e9e3dbe | 3413 | struct nfs4_stateowner *open_sop = NULL; |
b59e3c0e | 3414 | struct nfs4_stateowner *lock_sop = NULL; |
1da177e4 LT |
3415 | struct nfs4_stateid *lock_stp; |
3416 | struct file *filp; | |
3417 | struct file_lock file_lock; | |
8dc7c311 | 3418 | struct file_lock conflock; |
b37ad28b | 3419 | __be32 status = 0; |
1da177e4 | 3420 | unsigned int strhashval; |
150b3934 | 3421 | unsigned int cmd; |
b8dd7b9a | 3422 | int err; |
1da177e4 LT |
3423 | |
3424 | dprintk("NFSD: nfsd4_lock: start=%Ld length=%Ld\n", | |
3425 | (long long) lock->lk_offset, | |
3426 | (long long) lock->lk_length); | |
3427 | ||
1da177e4 LT |
3428 | if (check_lock_length(lock->lk_offset, lock->lk_length)) |
3429 | return nfserr_inval; | |
3430 | ||
ca364317 | 3431 | if ((status = fh_verify(rqstp, &cstate->current_fh, |
8837abca | 3432 | S_IFREG, NFSD_MAY_LOCK))) { |
a6f6ef2f AA |
3433 | dprintk("NFSD: nfsd4_lock: permission denied!\n"); |
3434 | return status; | |
3435 | } | |
3436 | ||
1da177e4 LT |
3437 | nfs4_lock_state(); |
3438 | ||
3439 | if (lock->lk_is_new) { | |
893f8770 N |
3440 | /* |
3441 | * Client indicates that this is a new lockowner. | |
3442 | * Use open owner and open stateid to create lock owner and | |
3443 | * lock stateid. | |
3444 | */ | |
1da177e4 LT |
3445 | struct nfs4_stateid *open_stp = NULL; |
3446 | struct nfs4_file *fp; | |
3447 | ||
3448 | status = nfserr_stale_clientid; | |
60adfc50 AA |
3449 | if (!nfsd4_has_session(cstate) && |
3450 | STALE_CLIENTID(&lock->lk_new_clientid)) | |
1da177e4 | 3451 | goto out; |
1da177e4 | 3452 | |
1da177e4 | 3453 | /* validate and update open stateid and open seqid */ |
dd453dfd | 3454 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3455 | lock->lk_new_open_seqid, |
3456 | &lock->lk_new_open_stateid, | |
f3362737 | 3457 | OPEN_STATE, |
3a65588a | 3458 | &lock->lk_replay_owner, &open_stp, |
b59e3c0e | 3459 | lock); |
37515177 | 3460 | if (status) |
1da177e4 | 3461 | goto out; |
3a65588a | 3462 | open_sop = lock->lk_replay_owner; |
1da177e4 LT |
3463 | /* create lockowner and lock stateid */ |
3464 | fp = open_stp->st_file; | |
3465 | strhashval = lock_ownerstr_hashval(fp->fi_inode, | |
3466 | open_sop->so_client->cl_clientid.cl_id, | |
3467 | &lock->v.new.owner); | |
3e9e3dbe N |
3468 | /* XXX: Do we need to check for duplicate stateowners on |
3469 | * the same file, or should they just be allowed (and | |
3470 | * create new stateids)? */ | |
1da177e4 | 3471 | status = nfserr_resource; |
b59e3c0e NB |
3472 | lock_sop = alloc_init_lock_stateowner(strhashval, |
3473 | open_sop->so_client, open_stp, lock); | |
3474 | if (lock_sop == NULL) | |
1da177e4 | 3475 | goto out; |
b59e3c0e | 3476 | lock_stp = alloc_init_lock_stateid(lock_sop, fp, open_stp); |
8a280510 | 3477 | if (lock_stp == NULL) |
1da177e4 | 3478 | goto out; |
1da177e4 LT |
3479 | } else { |
3480 | /* lock (lock owner + lock stateid) already exists */ | |
dd453dfd | 3481 | status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3482 | lock->lk_old_lock_seqid, |
3483 | &lock->lk_old_lock_stateid, | |
f3362737 | 3484 | LOCK_STATE, |
3a65588a | 3485 | &lock->lk_replay_owner, &lock_stp, lock); |
1da177e4 LT |
3486 | if (status) |
3487 | goto out; | |
3a65588a | 3488 | lock_sop = lock->lk_replay_owner; |
1da177e4 | 3489 | } |
3a65588a | 3490 | /* lock->lk_replay_owner and lock_stp have been created or found */ |
1da177e4 LT |
3491 | filp = lock_stp->st_vfs_file; |
3492 | ||
0dd395dc | 3493 | status = nfserr_grace; |
af558e33 | 3494 | if (locks_in_grace() && !lock->lk_reclaim) |
0dd395dc N |
3495 | goto out; |
3496 | status = nfserr_no_grace; | |
af558e33 | 3497 | if (!locks_in_grace() && lock->lk_reclaim) |
0dd395dc N |
3498 | goto out; |
3499 | ||
1da177e4 LT |
3500 | locks_init_lock(&file_lock); |
3501 | switch (lock->lk_type) { | |
3502 | case NFS4_READ_LT: | |
3503 | case NFS4_READW_LT: | |
3504 | file_lock.fl_type = F_RDLCK; | |
150b3934 | 3505 | cmd = F_SETLK; |
1da177e4 LT |
3506 | break; |
3507 | case NFS4_WRITE_LT: | |
3508 | case NFS4_WRITEW_LT: | |
3509 | file_lock.fl_type = F_WRLCK; | |
150b3934 | 3510 | cmd = F_SETLK; |
1da177e4 LT |
3511 | break; |
3512 | default: | |
3513 | status = nfserr_inval; | |
3514 | goto out; | |
3515 | } | |
b59e3c0e | 3516 | file_lock.fl_owner = (fl_owner_t)lock_sop; |
1da177e4 LT |
3517 | file_lock.fl_pid = current->tgid; |
3518 | file_lock.fl_file = filp; | |
3519 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3520 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3521 | |
3522 | file_lock.fl_start = lock->lk_offset; | |
87df4de8 | 3523 | file_lock.fl_end = last_byte_offset(lock->lk_offset, lock->lk_length); |
1da177e4 LT |
3524 | nfs4_transform_lock_offset(&file_lock); |
3525 | ||
3526 | /* | |
3527 | * Try to lock the file in the VFS. | |
3528 | * Note: locks.c uses the BKL to protect the inode's lock list. | |
3529 | */ | |
3530 | ||
fd85b817 | 3531 | err = vfs_lock_file(filp, cmd, &file_lock, &conflock); |
b8dd7b9a | 3532 | switch (-err) { |
1da177e4 LT |
3533 | case 0: /* success! */ |
3534 | update_stateid(&lock_stp->st_stateid); | |
3535 | memcpy(&lock->lk_resp_stateid, &lock_stp->st_stateid, | |
3536 | sizeof(stateid_t)); | |
b8dd7b9a | 3537 | status = 0; |
eb76b3fd AA |
3538 | break; |
3539 | case (EAGAIN): /* conflock holds conflicting lock */ | |
3540 | status = nfserr_denied; | |
3541 | dprintk("NFSD: nfsd4_lock: conflicting lock found!\n"); | |
3542 | nfs4_set_lock_denied(&conflock, &lock->lk_denied); | |
3543 | break; | |
1da177e4 LT |
3544 | case (EDEADLK): |
3545 | status = nfserr_deadlock; | |
eb76b3fd | 3546 | break; |
1da177e4 | 3547 | default: |
fd85b817 | 3548 | dprintk("NFSD: nfsd4_lock: vfs_lock_file() failed! status %d\n",err); |
eb76b3fd AA |
3549 | status = nfserr_resource; |
3550 | break; | |
1da177e4 | 3551 | } |
1da177e4 | 3552 | out: |
8a280510 | 3553 | if (status && lock->lk_is_new && lock_sop) |
f044ff83 | 3554 | release_lockowner(lock_sop); |
3a65588a BF |
3555 | if (lock->lk_replay_owner) { |
3556 | nfs4_get_stateowner(lock->lk_replay_owner); | |
a4f1706a | 3557 | cstate->replay_owner = lock->lk_replay_owner; |
f2327d9a | 3558 | } |
1da177e4 LT |
3559 | nfs4_unlock_state(); |
3560 | return status; | |
3561 | } | |
3562 | ||
55ef1274 BF |
3563 | /* |
3564 | * The NFSv4 spec allows a client to do a LOCKT without holding an OPEN, | |
3565 | * so we do a temporary open here just to get an open file to pass to | |
3566 | * vfs_test_lock. (Arguably perhaps test_lock should be done with an | |
3567 | * inode operation.) | |
3568 | */ | |
3569 | static int nfsd_test_lock(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file_lock *lock) | |
3570 | { | |
3571 | struct file *file; | |
3572 | int err; | |
3573 | ||
3574 | err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_READ, &file); | |
3575 | if (err) | |
3576 | return err; | |
3577 | err = vfs_test_lock(file, lock); | |
3578 | nfsd_close(file); | |
3579 | return err; | |
3580 | } | |
3581 | ||
1da177e4 LT |
3582 | /* |
3583 | * LOCKT operation | |
3584 | */ | |
b37ad28b | 3585 | __be32 |
ca364317 BF |
3586 | nfsd4_lockt(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
3587 | struct nfsd4_lockt *lockt) | |
1da177e4 LT |
3588 | { |
3589 | struct inode *inode; | |
1da177e4 | 3590 | struct file_lock file_lock; |
fd85b817 | 3591 | int error; |
b37ad28b | 3592 | __be32 status; |
1da177e4 | 3593 | |
af558e33 | 3594 | if (locks_in_grace()) |
1da177e4 LT |
3595 | return nfserr_grace; |
3596 | ||
3597 | if (check_lock_length(lockt->lt_offset, lockt->lt_length)) | |
3598 | return nfserr_inval; | |
3599 | ||
3600 | lockt->lt_stateowner = NULL; | |
3601 | nfs4_lock_state(); | |
3602 | ||
3603 | status = nfserr_stale_clientid; | |
60adfc50 | 3604 | if (!nfsd4_has_session(cstate) && STALE_CLIENTID(&lockt->lt_clientid)) |
1da177e4 | 3605 | goto out; |
1da177e4 | 3606 | |
ca364317 | 3607 | if ((status = fh_verify(rqstp, &cstate->current_fh, S_IFREG, 0))) { |
849823c5 | 3608 | dprintk("NFSD: nfsd4_lockt: fh_verify() failed!\n"); |
1da177e4 LT |
3609 | if (status == nfserr_symlink) |
3610 | status = nfserr_inval; | |
3611 | goto out; | |
3612 | } | |
3613 | ||
ca364317 | 3614 | inode = cstate->current_fh.fh_dentry->d_inode; |
1da177e4 LT |
3615 | locks_init_lock(&file_lock); |
3616 | switch (lockt->lt_type) { | |
3617 | case NFS4_READ_LT: | |
3618 | case NFS4_READW_LT: | |
3619 | file_lock.fl_type = F_RDLCK; | |
3620 | break; | |
3621 | case NFS4_WRITE_LT: | |
3622 | case NFS4_WRITEW_LT: | |
3623 | file_lock.fl_type = F_WRLCK; | |
3624 | break; | |
3625 | default: | |
2fdada03 | 3626 | dprintk("NFSD: nfs4_lockt: bad lock type!\n"); |
1da177e4 LT |
3627 | status = nfserr_inval; |
3628 | goto out; | |
3629 | } | |
3630 | ||
3631 | lockt->lt_stateowner = find_lockstateowner_str(inode, | |
3632 | &lockt->lt_clientid, &lockt->lt_owner); | |
3633 | if (lockt->lt_stateowner) | |
3634 | file_lock.fl_owner = (fl_owner_t)lockt->lt_stateowner; | |
3635 | file_lock.fl_pid = current->tgid; | |
3636 | file_lock.fl_flags = FL_POSIX; | |
3637 | ||
3638 | file_lock.fl_start = lockt->lt_offset; | |
87df4de8 | 3639 | file_lock.fl_end = last_byte_offset(lockt->lt_offset, lockt->lt_length); |
1da177e4 LT |
3640 | |
3641 | nfs4_transform_lock_offset(&file_lock); | |
3642 | ||
1da177e4 | 3643 | status = nfs_ok; |
55ef1274 | 3644 | error = nfsd_test_lock(rqstp, &cstate->current_fh, &file_lock); |
fd85b817 ME |
3645 | if (error) { |
3646 | status = nfserrno(error); | |
3647 | goto out; | |
3648 | } | |
9d6a8c5c | 3649 | if (file_lock.fl_type != F_UNLCK) { |
1da177e4 | 3650 | status = nfserr_denied; |
9d6a8c5c | 3651 | nfs4_set_lock_denied(&file_lock, &lockt->lt_denied); |
1da177e4 LT |
3652 | } |
3653 | out: | |
3654 | nfs4_unlock_state(); | |
3655 | return status; | |
3656 | } | |
3657 | ||
b37ad28b | 3658 | __be32 |
ca364317 | 3659 | nfsd4_locku(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate, |
a4f1706a | 3660 | struct nfsd4_locku *locku) |
1da177e4 LT |
3661 | { |
3662 | struct nfs4_stateid *stp; | |
3663 | struct file *filp = NULL; | |
3664 | struct file_lock file_lock; | |
b37ad28b | 3665 | __be32 status; |
b8dd7b9a | 3666 | int err; |
1da177e4 LT |
3667 | |
3668 | dprintk("NFSD: nfsd4_locku: start=%Ld length=%Ld\n", | |
3669 | (long long) locku->lu_offset, | |
3670 | (long long) locku->lu_length); | |
3671 | ||
3672 | if (check_lock_length(locku->lu_offset, locku->lu_length)) | |
3673 | return nfserr_inval; | |
3674 | ||
3675 | nfs4_lock_state(); | |
3676 | ||
dd453dfd | 3677 | if ((status = nfs4_preprocess_seqid_op(cstate, |
1da177e4 LT |
3678 | locku->lu_seqid, |
3679 | &locku->lu_stateid, | |
f3362737 | 3680 | LOCK_STATE, |
1da177e4 LT |
3681 | &locku->lu_stateowner, &stp, NULL))) |
3682 | goto out; | |
3683 | ||
3684 | filp = stp->st_vfs_file; | |
3685 | BUG_ON(!filp); | |
3686 | locks_init_lock(&file_lock); | |
3687 | file_lock.fl_type = F_UNLCK; | |
3688 | file_lock.fl_owner = (fl_owner_t) locku->lu_stateowner; | |
3689 | file_lock.fl_pid = current->tgid; | |
3690 | file_lock.fl_file = filp; | |
3691 | file_lock.fl_flags = FL_POSIX; | |
d5b9026a | 3692 | file_lock.fl_lmops = &nfsd_posix_mng_ops; |
1da177e4 LT |
3693 | file_lock.fl_start = locku->lu_offset; |
3694 | ||
87df4de8 | 3695 | file_lock.fl_end = last_byte_offset(locku->lu_offset, locku->lu_length); |
1da177e4 LT |
3696 | nfs4_transform_lock_offset(&file_lock); |
3697 | ||
3698 | /* | |
3699 | * Try to unlock the file in the VFS. | |
3700 | */ | |
fd85b817 | 3701 | err = vfs_lock_file(filp, F_SETLK, &file_lock, NULL); |
b8dd7b9a | 3702 | if (err) { |
fd85b817 | 3703 | dprintk("NFSD: nfs4_locku: vfs_lock_file failed!\n"); |
1da177e4 LT |
3704 | goto out_nfserr; |
3705 | } | |
3706 | /* | |
3707 | * OK, unlock succeeded; the only thing left to do is update the stateid. | |
3708 | */ | |
3709 | update_stateid(&stp->st_stateid); | |
3710 | memcpy(&locku->lu_stateid, &stp->st_stateid, sizeof(stateid_t)); | |
3711 | ||
3712 | out: | |
f2327d9a | 3713 | if (locku->lu_stateowner) { |
1da177e4 | 3714 | nfs4_get_stateowner(locku->lu_stateowner); |
a4f1706a | 3715 | cstate->replay_owner = locku->lu_stateowner; |
f2327d9a | 3716 | } |
1da177e4 LT |
3717 | nfs4_unlock_state(); |
3718 | return status; | |
3719 | ||
3720 | out_nfserr: | |
b8dd7b9a | 3721 | status = nfserrno(err); |
1da177e4 LT |
3722 | goto out; |
3723 | } | |
3724 | ||
3725 | /* | |
3726 | * returns | |
3727 | * 1: locks held by lockowner | |
3728 | * 0: no locks held by lockowner | |
3729 | */ | |
3730 | static int | |
3731 | check_for_locks(struct file *filp, struct nfs4_stateowner *lowner) | |
3732 | { | |
3733 | struct file_lock **flpp; | |
7eaa36e2 | 3734 | struct inode *inode = filp->f_path.dentry->d_inode; |
1da177e4 LT |
3735 | int status = 0; |
3736 | ||
3737 | lock_kernel(); | |
3738 | for (flpp = &inode->i_flock; *flpp != NULL; flpp = &(*flpp)->fl_next) { | |
796dadfd | 3739 | if ((*flpp)->fl_owner == (fl_owner_t)lowner) { |
1da177e4 LT |
3740 | status = 1; |
3741 | goto out; | |
796dadfd | 3742 | } |
1da177e4 LT |
3743 | } |
3744 | out: | |
3745 | unlock_kernel(); | |
3746 | return status; | |
3747 | } | |
3748 | ||
b37ad28b | 3749 | __be32 |
b591480b BF |
3750 | nfsd4_release_lockowner(struct svc_rqst *rqstp, |
3751 | struct nfsd4_compound_state *cstate, | |
3752 | struct nfsd4_release_lockowner *rlockowner) | |
1da177e4 LT |
3753 | { |
3754 | clientid_t *clid = &rlockowner->rl_clientid; | |
3e9e3dbe N |
3755 | struct nfs4_stateowner *sop; |
3756 | struct nfs4_stateid *stp; | |
1da177e4 | 3757 | struct xdr_netobj *owner = &rlockowner->rl_owner; |
3e9e3dbe N |
3758 | struct list_head matches; |
3759 | int i; | |
b37ad28b | 3760 | __be32 status; |
1da177e4 LT |
3761 | |
3762 | dprintk("nfsd4_release_lockowner clientid: (%08x/%08x):\n", | |
3763 | clid->cl_boot, clid->cl_id); | |
3764 | ||
3765 | /* XXX check for lease expiration */ | |
3766 | ||
3767 | status = nfserr_stale_clientid; | |
849823c5 | 3768 | if (STALE_CLIENTID(clid)) |
1da177e4 | 3769 | return status; |
1da177e4 LT |
3770 | |
3771 | nfs4_lock_state(); | |
3772 | ||
3e9e3dbe N |
3773 | status = nfserr_locks_held; |
3774 | /* XXX: we're doing a linear search through all the lockowners. | |
3775 | * Yipes! For now we'll just hope clients aren't really using | |
3776 | * release_lockowner much, but eventually we have to fix these | |
3777 | * data structures. */ | |
3778 | INIT_LIST_HEAD(&matches); | |
3779 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3780 | list_for_each_entry(sop, &lock_ownerid_hashtbl[i], so_idhash) { | |
599e0a22 | 3781 | if (!same_owner_str(sop, owner, clid)) |
3e9e3dbe N |
3782 | continue; |
3783 | list_for_each_entry(stp, &sop->so_stateids, | |
3784 | st_perstateowner) { | |
3785 | if (check_for_locks(stp->st_vfs_file, sop)) | |
3786 | goto out; | |
3787 | /* Note: so_perclient unused for lockowners, | |
3788 | * so it's OK to fool with here. */ | |
3789 | list_add(&sop->so_perclient, &matches); | |
3790 | } | |
1da177e4 | 3791 | } |
3e9e3dbe N |
3792 | } |
3793 | /* Clients probably won't expect us to return with some (but not all) | |
3794 | * of the lockowner state released; so don't release any until all | |
3795 | * have been checked. */ | |
3796 | status = nfs_ok; | |
0fa822e4 N |
3797 | while (!list_empty(&matches)) { |
3798 | sop = list_entry(matches.next, struct nfs4_stateowner, | |
3799 | so_perclient); | |
3800 | /* unhash_stateowner deletes so_perclient only | |
3801 | * for openowners. */ | |
3802 | list_del(&sop->so_perclient); | |
f044ff83 | 3803 | release_lockowner(sop); |
1da177e4 LT |
3804 | } |
3805 | out: | |
3806 | nfs4_unlock_state(); | |
3807 | return status; | |
3808 | } | |
3809 | ||
3810 | static inline struct nfs4_client_reclaim * | |
a55370a3 | 3811 | alloc_reclaim(void) |
1da177e4 | 3812 | { |
a55370a3 | 3813 | return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL); |
1da177e4 LT |
3814 | } |
3815 | ||
c7b9a459 | 3816 | int |
a1bcecd2 | 3817 | nfs4_has_reclaimed_state(const char *name, bool use_exchange_id) |
c7b9a459 N |
3818 | { |
3819 | unsigned int strhashval = clientstr_hashval(name); | |
3820 | struct nfs4_client *clp; | |
3821 | ||
a1bcecd2 | 3822 | clp = find_confirmed_client_by_str(name, strhashval, use_exchange_id); |
c7b9a459 N |
3823 | return clp ? 1 : 0; |
3824 | } | |
3825 | ||
1da177e4 LT |
3826 | /* |
3827 | * failure => all reset bets are off, nfserr_no_grace... | |
3828 | */ | |
190e4fbf N |
3829 | int |
3830 | nfs4_client_to_reclaim(const char *name) | |
1da177e4 LT |
3831 | { |
3832 | unsigned int strhashval; | |
3833 | struct nfs4_client_reclaim *crp = NULL; | |
3834 | ||
a55370a3 N |
3835 | dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name); |
3836 | crp = alloc_reclaim(); | |
1da177e4 LT |
3837 | if (!crp) |
3838 | return 0; | |
a55370a3 | 3839 | strhashval = clientstr_hashval(name); |
1da177e4 LT |
3840 | INIT_LIST_HEAD(&crp->cr_strhash); |
3841 | list_add(&crp->cr_strhash, &reclaim_str_hashtbl[strhashval]); | |
a55370a3 | 3842 | memcpy(crp->cr_recdir, name, HEXDIR_LEN); |
1da177e4 LT |
3843 | reclaim_str_hashtbl_size++; |
3844 | return 1; | |
3845 | } | |
3846 | ||
3847 | static void | |
3848 | nfs4_release_reclaim(void) | |
3849 | { | |
3850 | struct nfs4_client_reclaim *crp = NULL; | |
3851 | int i; | |
3852 | ||
1da177e4 LT |
3853 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3854 | while (!list_empty(&reclaim_str_hashtbl[i])) { | |
3855 | crp = list_entry(reclaim_str_hashtbl[i].next, | |
3856 | struct nfs4_client_reclaim, cr_strhash); | |
3857 | list_del(&crp->cr_strhash); | |
1da177e4 LT |
3858 | kfree(crp); |
3859 | reclaim_str_hashtbl_size--; | |
3860 | } | |
3861 | } | |
3862 | BUG_ON(reclaim_str_hashtbl_size); | |
3863 | } | |
3864 | ||
3865 | /* | |
3866 | * called from OPEN, CLAIM_PREVIOUS with a new clientid. */ | |
fd39ca9a | 3867 | static struct nfs4_client_reclaim * |
1da177e4 LT |
3868 | nfs4_find_reclaim_client(clientid_t *clid) |
3869 | { | |
3870 | unsigned int strhashval; | |
3871 | struct nfs4_client *clp; | |
3872 | struct nfs4_client_reclaim *crp = NULL; | |
3873 | ||
3874 | ||
3875 | /* find clientid in conf_id_hashtbl */ | |
3876 | clp = find_confirmed_client(clid); | |
3877 | if (clp == NULL) | |
3878 | return NULL; | |
3879 | ||
a55370a3 N |
3880 | dprintk("NFSD: nfs4_find_reclaim_client for %.*s with recdir %s\n", |
3881 | clp->cl_name.len, clp->cl_name.data, | |
3882 | clp->cl_recdir); | |
1da177e4 LT |
3883 | |
3884 | /* find clp->cl_name in reclaim_str_hashtbl */ | |
a55370a3 | 3885 | strhashval = clientstr_hashval(clp->cl_recdir); |
1da177e4 | 3886 | list_for_each_entry(crp, &reclaim_str_hashtbl[strhashval], cr_strhash) { |
a55370a3 | 3887 | if (same_name(crp->cr_recdir, clp->cl_recdir)) { |
1da177e4 LT |
3888 | return crp; |
3889 | } | |
3890 | } | |
3891 | return NULL; | |
3892 | } | |
3893 | ||
3894 | /* | |
3895 | * Called from OPEN. Look for clientid in reclaim list. | |
3896 | */ | |
b37ad28b | 3897 | __be32 |
1da177e4 LT |
3898 | nfs4_check_open_reclaim(clientid_t *clid) |
3899 | { | |
dfc83565 | 3900 | return nfs4_find_reclaim_client(clid) ? nfs_ok : nfserr_reclaim_bad; |
1da177e4 LT |
3901 | } |
3902 | ||
ac4d8ff2 | 3903 | /* initialization to perform at module load time: */ |
1da177e4 | 3904 | |
e8ff2a84 | 3905 | int |
ac4d8ff2 | 3906 | nfs4_state_init(void) |
1da177e4 | 3907 | { |
e8ff2a84 | 3908 | int i, status; |
1da177e4 | 3909 | |
e8ff2a84 BF |
3910 | status = nfsd4_init_slabs(); |
3911 | if (status) | |
3912 | return status; | |
1da177e4 LT |
3913 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
3914 | INIT_LIST_HEAD(&conf_id_hashtbl[i]); | |
3915 | INIT_LIST_HEAD(&conf_str_hashtbl[i]); | |
3916 | INIT_LIST_HEAD(&unconf_str_hashtbl[i]); | |
3917 | INIT_LIST_HEAD(&unconf_id_hashtbl[i]); | |
02cb2858 | 3918 | INIT_LIST_HEAD(&reclaim_str_hashtbl[i]); |
1da177e4 | 3919 | } |
5282fd72 ME |
3920 | for (i = 0; i < SESSION_HASH_SIZE; i++) |
3921 | INIT_LIST_HEAD(&sessionid_hashtbl[i]); | |
1da177e4 LT |
3922 | for (i = 0; i < FILE_HASH_SIZE; i++) { |
3923 | INIT_LIST_HEAD(&file_hashtbl[i]); | |
3924 | } | |
3925 | for (i = 0; i < OWNER_HASH_SIZE; i++) { | |
3926 | INIT_LIST_HEAD(&ownerstr_hashtbl[i]); | |
3927 | INIT_LIST_HEAD(&ownerid_hashtbl[i]); | |
3928 | } | |
3929 | for (i = 0; i < STATEID_HASH_SIZE; i++) { | |
3930 | INIT_LIST_HEAD(&stateid_hashtbl[i]); | |
3931 | INIT_LIST_HEAD(&lockstateid_hashtbl[i]); | |
3932 | } | |
3933 | for (i = 0; i < LOCK_HASH_SIZE; i++) { | |
3934 | INIT_LIST_HEAD(&lock_ownerid_hashtbl[i]); | |
3935 | INIT_LIST_HEAD(&lock_ownerstr_hashtbl[i]); | |
3936 | } | |
1da177e4 | 3937 | memset(&onestateid, ~0, sizeof(stateid_t)); |
1da177e4 LT |
3938 | INIT_LIST_HEAD(&close_lru); |
3939 | INIT_LIST_HEAD(&client_lru); | |
3940 | INIT_LIST_HEAD(&del_recall_lru); | |
ac4d8ff2 | 3941 | reclaim_str_hashtbl_size = 0; |
e8ff2a84 | 3942 | return 0; |
ac4d8ff2 N |
3943 | } |
3944 | ||
190e4fbf N |
3945 | static void |
3946 | nfsd4_load_reboot_recovery_data(void) | |
3947 | { | |
3948 | int status; | |
3949 | ||
0964a3d3 N |
3950 | nfs4_lock_state(); |
3951 | nfsd4_init_recdir(user_recovery_dirname); | |
190e4fbf | 3952 | status = nfsd4_recdir_load(); |
0964a3d3 | 3953 | nfs4_unlock_state(); |
190e4fbf N |
3954 | if (status) |
3955 | printk("NFSD: Failure reading reboot recovery data\n"); | |
3956 | } | |
3957 | ||
c2f1a551 MS |
3958 | /* |
3959 | * Since the lifetime of a delegation isn't limited to that of an open, a | |
3960 | * client may quite reasonably hang on to a delegation as long as it has | |
3961 | * the inode cached. This becomes an obvious problem the first time a | |
3962 | * client's inode cache approaches the size of the server's total memory. | |
3963 | * | |
3964 | * For now we avoid this problem by imposing a hard limit on the number | |
3965 | * of delegations, which varies according to the server's memory size. | |
3966 | */ | |
3967 | static void | |
3968 | set_max_delegations(void) | |
3969 | { | |
3970 | /* | |
3971 | * Allow at most 4 delegations per megabyte of RAM. Quick | |
3972 | * estimates suggest that in the worst case (where every delegation | |
3973 | * is for a different inode), a delegation could take about 1.5K, | |
3974 | * giving a worst case usage of about 6% of memory. | |
3975 | */ | |
3976 | max_delegations = nr_free_buffer_pages() >> (20 - 2 - PAGE_SHIFT); | |
3977 | } | |
3978 | ||
ac4d8ff2 N |
3979 | /* initialization to perform when the nfsd service is started: */ |
3980 | ||
29ab23cc | 3981 | static int |
ac4d8ff2 N |
3982 | __nfs4_state_start(void) |
3983 | { | |
b5a1a81e BF |
3984 | int ret; |
3985 | ||
1da177e4 | 3986 | boot_time = get_seconds(); |
af558e33 | 3987 | locks_start_grace(&nfsd4_manager); |
9a8db97e | 3988 | printk(KERN_INFO "NFSD: starting %ld-second grace period\n", |
e46b498c | 3989 | nfsd4_grace); |
b5a1a81e BF |
3990 | ret = set_callback_cred(); |
3991 | if (ret) | |
3992 | return -ENOMEM; | |
58da282b | 3993 | laundry_wq = create_singlethread_workqueue("nfsd4"); |
29ab23cc BF |
3994 | if (laundry_wq == NULL) |
3995 | return -ENOMEM; | |
b5a1a81e BF |
3996 | ret = nfsd4_create_callback_queue(); |
3997 | if (ret) | |
3998 | goto out_free_laundry; | |
e46b498c | 3999 | queue_delayed_work(laundry_wq, &laundromat_work, nfsd4_grace * HZ); |
c2f1a551 | 4000 | set_max_delegations(); |
b5a1a81e BF |
4001 | return 0; |
4002 | out_free_laundry: | |
4003 | destroy_workqueue(laundry_wq); | |
4004 | return ret; | |
1da177e4 LT |
4005 | } |
4006 | ||
29ab23cc | 4007 | int |
76a3550e | 4008 | nfs4_state_start(void) |
1da177e4 | 4009 | { |
29ab23cc BF |
4010 | int ret; |
4011 | ||
1da177e4 | 4012 | if (nfs4_init) |
29ab23cc | 4013 | return 0; |
190e4fbf | 4014 | nfsd4_load_reboot_recovery_data(); |
29ab23cc BF |
4015 | ret = __nfs4_state_start(); |
4016 | if (ret) | |
4017 | return ret; | |
1da177e4 | 4018 | nfs4_init = 1; |
29ab23cc | 4019 | return 0; |
1da177e4 LT |
4020 | } |
4021 | ||
1da177e4 LT |
4022 | static void |
4023 | __nfs4_state_shutdown(void) | |
4024 | { | |
4025 | int i; | |
4026 | struct nfs4_client *clp = NULL; | |
4027 | struct nfs4_delegation *dp = NULL; | |
1da177e4 LT |
4028 | struct list_head *pos, *next, reaplist; |
4029 | ||
1da177e4 LT |
4030 | for (i = 0; i < CLIENT_HASH_SIZE; i++) { |
4031 | while (!list_empty(&conf_id_hashtbl[i])) { | |
4032 | clp = list_entry(conf_id_hashtbl[i].next, struct nfs4_client, cl_idhash); | |
4033 | expire_client(clp); | |
4034 | } | |
4035 | while (!list_empty(&unconf_str_hashtbl[i])) { | |
4036 | clp = list_entry(unconf_str_hashtbl[i].next, struct nfs4_client, cl_strhash); | |
4037 | expire_client(clp); | |
4038 | } | |
4039 | } | |
4040 | INIT_LIST_HEAD(&reaplist); | |
4041 | spin_lock(&recall_lock); | |
4042 | list_for_each_safe(pos, next, &del_recall_lru) { | |
4043 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4044 | list_move(&dp->dl_recall_lru, &reaplist); | |
4045 | } | |
4046 | spin_unlock(&recall_lock); | |
4047 | list_for_each_safe(pos, next, &reaplist) { | |
4048 | dp = list_entry (pos, struct nfs4_delegation, dl_recall_lru); | |
4049 | list_del_init(&dp->dl_recall_lru); | |
4050 | unhash_delegation(dp); | |
4051 | } | |
4052 | ||
190e4fbf | 4053 | nfsd4_shutdown_recdir(); |
1da177e4 | 4054 | nfs4_init = 0; |
1da177e4 LT |
4055 | } |
4056 | ||
4057 | void | |
4058 | nfs4_state_shutdown(void) | |
4059 | { | |
5e8d5c29 N |
4060 | cancel_rearming_delayed_workqueue(laundry_wq, &laundromat_work); |
4061 | destroy_workqueue(laundry_wq); | |
2c5e7615 | 4062 | locks_end_grace(&nfsd4_manager); |
1da177e4 LT |
4063 | nfs4_lock_state(); |
4064 | nfs4_release_reclaim(); | |
4065 | __nfs4_state_shutdown(); | |
b5a1a81e | 4066 | nfsd4_destroy_callback_queue(); |
1da177e4 LT |
4067 | nfs4_unlock_state(); |
4068 | } | |
4069 | ||
3dd98a3b JL |
4070 | /* |
4071 | * user_recovery_dirname is protected by the nfsd_mutex since it's only | |
4072 | * accessed when nfsd is starting. | |
4073 | */ | |
0964a3d3 N |
4074 | static void |
4075 | nfs4_set_recdir(char *recdir) | |
4076 | { | |
0964a3d3 | 4077 | strcpy(user_recovery_dirname, recdir); |
0964a3d3 N |
4078 | } |
4079 | ||
4080 | /* | |
4081 | * Change the NFSv4 recovery directory to recdir. | |
4082 | */ | |
4083 | int | |
4084 | nfs4_reset_recoverydir(char *recdir) | |
4085 | { | |
4086 | int status; | |
a63bb996 | 4087 | struct path path; |
0964a3d3 | 4088 | |
a63bb996 | 4089 | status = kern_path(recdir, LOOKUP_FOLLOW, &path); |
0964a3d3 N |
4090 | if (status) |
4091 | return status; | |
4092 | status = -ENOTDIR; | |
a63bb996 | 4093 | if (S_ISDIR(path.dentry->d_inode->i_mode)) { |
0964a3d3 N |
4094 | nfs4_set_recdir(recdir); |
4095 | status = 0; | |
4096 | } | |
a63bb996 | 4097 | path_put(&path); |
0964a3d3 N |
4098 | return status; |
4099 | } | |
4100 | ||
3dd98a3b JL |
4101 | char * |
4102 | nfs4_recoverydir(void) | |
4103 | { | |
4104 | return user_recovery_dirname; | |
4105 | } |